Category Archives: Thornton Weather

Thornton’s March weather preview: While things warm up, significant snow remains a possibility

The month of March in Denver is usually one that is welcomed heartily by residents. We begin to shake off the cold of winter with warmer temperatures and calmer conditions. That does not mean we are done with snow and cold by any means.

March usually offers healthy snowfall giving us an opportunity to add to our seasonal totals.  While there is good snow potential in March, the month also typically brings much warmer temperatures.

March is historically Denver’s snowiest month and brings about 20% of our annual snowfall.  Heavy, wet spring snow storms can oftentimes bring the entire month’s snowfall total in one monstrous snow.

We also start the transition to spring and severe weather season and the month typically brings our first thunderstorms of the year.  Temperatures climb throughout the month and by the end our average daytime highs are near 60 degrees.

For a complete look at what lies ahead in March 2018, click here.

February 2019 weather recap: Thornton experiences a very cold, somewhat snowy month

Cold and snow. Those were certainly the operative words for the month of February 19. Thornton recorded its coldest February in the past 12 years and its snowiest month overall since March 2016.

Mild temperatures started things off for the first four days of the month and fooled us into thinking of an early spring. Those dreams were soon crushed though as the first extended period of below normal temperatures arrived on the 6th. Six straight days of below normal temperatures then arrived as did our first shot of snow for the month.

We rebounded briefly for a four day period from the 12th to the 15th with mild temperatures. Once again though, the mercury plunged delivering 13 straight days of below normal temperatures and five days of measurable snowfall.

Thornton recorded an average temperature for the month of 26.3 degrees. This was our coldest February since ThorntonWeather.com came online in 2007 – by more than two degrees. Out at Denver International Airport where the Mile High City’s official readings are taken it was slightly warmer with an average of 28.0 degrees.  Both were well below Denver’s long term February average of 32.5 degrees for February.

While certainly cold, neither average reading for the month could crack Denver’s list of top 10 coldest Februarys.

Thornton saw its warmest mercury reading for the month of 62.3 degrees on the second. Its coldest reading of -7.7 degrees came on the 7th of the month. Denver saw a maximum of 65 degrees on the 3rd and its low of -11 degrees on the 7th.

February is usually a dry month with Denver averaging 0.37 inches of liquid precipitation. Thornton recorded 0.60 inches this year while Denver saw 0.72 inches.

Similarly, snow was a good bit above normal for February as well. Thornton saw 11.2 inches of the white stuff while out at the airport 13.4 inches was recorded.

Click here to view Thornton’s January 2019 climate report.

Thornton, Colorado's temperature summary for February 2019. (ThorntonWeather.com)
Thornton, Colorado’s temperature summary for February 2019. (ThorntonWeather.com)
Thornton, Colorado's precipitation summary for February 2019. (ThorntonWeather.com)
Thornton, Colorado’s precipitation summary for February 2019. (ThorntonWeather.com)
CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
555 AM MST FRI MAR 1 2019

...................................

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2019

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              80   02/10/2017
 LOW              -25   02/01/1951
                        02/08/1936
HIGHEST            65   02/03
LOWEST            -11   02/07
AVG. MAXIMUM     40.8              46.2    -5.4     44.4
AVG. MINIMUM     15.3              18.9    -3.6     15.4
MEAN             28.0              32.5    -4.5     29.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      8               3.9     4.1        6
DAYS MIN <= 32     26              26.9    -0.9       26
DAYS MIN <= 0       3               1.3     1.7        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.01   1934
 MINIMUM         0.01   1970
TOTALS           0.72              0.37    0.35     0.31
DAILY AVG.       0.03              0.01    0.02     0.01
DAYS >= .01         6               5.3     0.7        5
DAYS >= .10         3               0.7     2.3        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.41   02/22

             OBSERVED            NORMAL   DEPART   LAST YEAR`S
SNOWFALL (INCHES)
TOTAL            13.4               5.7      7.7     6.2
RECORD FEB       22.4   2015
SEASON TOTAL     27.8              35.2

DEGREE_DAYS
HEATING TOTAL    1029               908     121      975
 SINCE 7/1       4417              4439     -22     4057
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.5
RESULTANT WIND SPEED/DIRECTION   1/176
HIGHEST WIND SPEED/DIRECTION    35/060    DATE  02/14
HIGHEST GUST SPEED/DIRECTION    42/070    DATE  02/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             20
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDER        0   FREEZING RAIN    0      LIGHT SNOW    14
MIXED PRECIP   0   LGT FR RAIN      0      ICE PELLETS    0
HEAVY RAIN     0   HAIL             0      FOG           17
RAIN           0   HEAVY SNOW       2      HEAVY FOG     11
LIGHT RAIN     0   MODERATE SNOW    3      HAZE           8

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

February 2019 top shots: Monthly photo slideshow

February 4, 2019 - A bison and bird boop noses on a mild winter day. (Jessica Fey)
February 4, 2019 – A bison and bird boop noses on a mild winter day. (Jessica Fey)

February signifies the start of the climb toward warmer temperatures for the year.  Cold and snow though do intrude but, coupled with milder conditions, there are lots of photo opportunities as can be seen in our monthly slideshow.

The month is one of our least snowiest of the year but it isn’t unusual to see the landscape blanketed in white.  Warming temperatures through the month can bring the onset of spring fever and gives residents the opportunity to enjoy some prolonged time outdoors on the mild days.

Cold or mild, snowy or dry, our scenery is almost always gorgeous – and photo worthy.

  • Slideshow updated February 27, 2019
  • To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather-related imagery.

Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted in images captured from yours and our cameras.

[flickr_set id=”72157676280611747″]

What is missing in the slideshow above?  Your photo!

Our monthly photo slideshow is going to feature images that we have taken but more importantly images that you have captured.  The photos can be of anything even remotely weather-related.

Landscapes, current conditions, wildlife, pets, kids.  Whimsical, newsy, artsy.  Taken at the zoo, some other area attraction, a local park, a national park or your backyard.  You name it, we want to see and share it!

Images can be taken in Thornton, Denver or anywhere across the extraordinary Centennial State.  We’ll even take some from out of state if we can tie it to Colorado somehow.

We’ll keep the criteria very open to interpretation with just about any image eligible to be shown in our slideshows.

What do you win for having your image in our slideshow?  We are just a ‘mom and pop’ outfit and make no money from our site so we really don’t have the means to provide prizes.  However you will have our undying gratitude and the satisfaction that your images are shared on the most popular website in Thornton.

To share you images with us and get them included in the slideshow just email them to us or share them with ThorntonWeather.com on any of the various social media outlets.  Links are provided below.

So come on, get those camera’s rolling!

Thornton’s February weather preview: Temperatures warm, snow isn’t usually big

February in Colorado typically brings to an end an extended period when average temperatures are at their lowest. Winter begins to loosen its grip and temperatures get warmer but precipitation is not a particularly common event during the month.

Thus far our snow season has been relatively dismal with the seasonal total in Thornton more than 10 inches below average.  In the high country, the snowpack is not faring much better.  February is only our sixth snowiest month so we may not see much snowfall for the balance of the month.

Temperatures however do usually see a nice rebound during the month. Average high temperatures climb from an average of 44 degrees at the start to 50 degrees by the end of February.

For the complete February preview including a look at historical averages and extremes as well as a look at what long range forecasts are predicting, click here. 

January 2019 weather recap: Wetter than normal, temperatures near average

Finally! Our winter thus far had been quite dry so seeing some precipitation in January was a very welcome change. Temperatures were just a bit above normal.

Overall, the month was short on any sort of real weather drama with no major storms or particularly notable temperature extremes.  However, a series of storm systems did give us a bit of a roller coaster of weather with five different snow events over the month.

January started out with a very cold New Year’s Day but soon saw warmer temperatures arrive. Our first snow came on the 11th and 12th. This was followed by some smaller events and finally our biggest snowfall of the month on the 28th.

Thornton’s average temperature for the month came in at 31.3 degrees. This was a bit warmer than Denver’s long term overage for January of 30.7 degrees. Out at DIA where Denver’s official readings are taken, it was a bit warmer with an average of 32.0 degrees.

Our mercury readings ranged from a low of 2.2 degrees on the 1st and the 2nd to a high of 61.1 degrees a few days later on the 4th.  Denver’s lowest reading was 5 degrees below zero on the first and its warmest of 62 degrees came on the 4th.

In terms of precipitation, Denver averages 0.41 inches of liquid precipitation during January. Thornton easily bested that with an even 1 inch in our bucket. Denver was above average as well with 0.75 inches.

Snowfall in Thornton saw above normal levels with a total for the month of 10.9 inches. Denver, as usual, lagged with 6.2 inches of the white stuff. The 30 year average for Denver for January is 7.0 inches.

Click here to view Thornton’s January 2019 climate report.

Thornton, Colorado's January 2019 temperature summary. (ThorntonWeather.com)
Thornton, Colorado’s January 2019 temperature summary. (ThorntonWeather.com)
Thornton, Colorado's January 2019 precipitation summary. (ThorntonWeather.com)
Thornton, Colorado’s January 2019 precipitation summary. (ThorntonWeather.com)
CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1026 AM MST FRI FEB 1 2019

...................................

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2019

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              76   01/27/1888
 LOW              -29   01/09/1875
HIGHEST            62   01/04        76     -14       68  01/09
LOWEST             -5   01/01       -29      24       -4  01/16
AVG. MAXIMUM     44.6              44.0     0.6     49.2
AVG. MINIMUM     19.5              17.4     2.1     20.1
MEAN             32.0              30.7     1.3     34.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      6               5.5     0.5        3
DAYS MIN <= 32     29              29.4    -0.4       28
DAYS MIN <= 0       1               1.7    -0.7        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.35   1883
 MINIMUM         0.01   1933
                        1934
                        1952
TOTALS           0.75              0.41    0.34     0.54
DAILY AVG.       0.02              0.01    0.01     0.02
DAYS >= .01         6               4.1     1.9        5
DAYS >= .10         2               0.9     1.1        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.45   01/11 TO 01/11           01/21 TO 01/21

OBSERVED          NORMAL  DEPART  LAST YEAR`S

SNOWFALL (INCHES)
TOTALS            6.2               7.0
RECORD           24.3  1992

DEGREE_DAYS
HEATING TOTAL    1016              1063     -47      932
 SINCE 7/1       3388              3531    -143     3082
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   4/214
HIGHEST WIND SPEED/DIRECTION    40/290    DATE  01/07
HIGHEST GUST SPEED/DIRECTION    54/350    DATE  01/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     58


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

January 2019 top shots: Monthly photo slideshow

Stunning lenticular clouds at sunset over the Colorado Front Range. (David Canfield)
Stunning lenticular clouds at sunset over the Colorado Front Range. (David Canfield)

As one of our coldest months, January can be a good month to hibernate inside and avoid the outdoors.  But, like any month in Colorado, photo opportunities abound as our monthly slideshow demonstrates.

Snow is not normally dominant in the month but when it does fall, it can create a beautiful blanket of white.  Throw in the amazing sunrises and sunsets we receive in the middle of winter as well as wildlife and a host of other subjects and the imagery can be quite beautiful and stunning.

  • Slideshow updated January 29, 2019
  • To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather-related imagery.

Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted in images captured from yours and our cameras.

[flickr_set id=”72157677459558328″]

What is missing in the slideshow above?  Your photo!

Our monthly photo slideshow is going to feature images that we have taken but more importantly images that you have captured.  The photos can be of anything even remotely weather-related.

Landscapes, current conditions, wildlife, pets, kids.  Whimsical, newsy, artsy.  Taken at the zoo, some other area attraction, a local park, a national park or your backyard.  You name it, we want to see and share it!

Images can be taken in Thornton, Denver or anywhere across the extraordinary Centennial State.  We’ll even take some from out of state if we can tie it to Colorado somehow.

We’ll keep the criteria very open to interpretation with just about any image eligible to be shown in our slideshows.

What do you win for having your image in our slideshow?  We are just a ‘mom and pop’ outfit and make no money from our site so we really don’t have the means to provide prizes.  However you will have our undying gratitude and the satisfaction that your images are shared on the most popular website in Thornton.

To share you images with us and get them included in the slideshow just email them to us or share them with ThorntonWeather.com on any of the various social media outlets.  Links are provided below.

So come on, get those camera’s rolling!

Time lapse video: Thornton’s January 28, 2019 snowstorm

Well, that was fun, eh?  Well, probably not for those stuck in traffic when the snowstorm hit this morning.

The storm over-performed big time, far exceeding forecasts. Upslope flow pushed the system against the mountains and kept it in place over the Front Range.

Our east webcam captures it all in a time lapse.

Snow begins at about 3:00am and continued through much of the morning. By the end of the day though, blue skies returned and the snow was melting. We recorded 4.2 inches here but know many spots, particularly to the west, got more.

December 2018 weather recap: Warmer and much drier than normal

Thornton’s December was lacking in terms of any sort of real weather drama. Temperatures were relatively mild for much of the month and precipitation was fleeting.

Above normal temperatures were the general rule for the first part of the month. It was only the last week of the month when Arctic air arrived and we saw temperatures drop considerably. We saw only two measurable snow events, neither of which amounted to much.

Overall, Thornton’s average temperature for the month was 30.8 degrees. This was nearly a full degree above Denver’s long term December average of 30.0 degrees. Out at DIA where the Mile High City’s official measurements are taken, it was a good bit warmer with an average of 32.5 degrees.

Temperatures in Thornton ranged from a high of 60.6 degrees on the 21st down to a low of 4.5 degrees on the morning of the 29th. Denver’s warmest reading of 63 degrees also came on the 21st and its coldest, 0 degrees, on the 31st.

Denver averages 0.35 inches of precipitation during December. Thornton fell well short with a mere 0.07 inches. Out at the airport, even less was realized with 0.03 being recorded. This puts December 2018 into the books as one of the driest Decembers ever recorded.

Ten driest December’s in Denver weather history (since 1872):
INCHES
0.00 – 1881
TRACE – 1905
0.01 – 1906, 1895
0.03 – 1977, 1931, 2018
0.04 – 2004, 1890
0.05 – 2002, 1995

Thornton recorded a mere 0.9 inches of snow during the month, the majority of which fell on the last day of the month. Denver saw 0.5 inches, all on the 31st.  Both fall well short of the long term Denver average for December snowfall of 8.5 inches and put December 2018 on the list of the ten least snowy Decembers recorded.

Ten least snowy December’s in Denver weather history:
TRACE – 1905, 1906, 2002
0.1 – 1928
0.4 – 1890
0.5 – 1935, 2018
0.6 – 1995
0.7 – 1977, 1895

Click here to view Thornton’s December 2018 climate report.

Thornton, Colorado's December 2018 Temperature Summary. (ThorntonWeather.com)
Thornton, Colorado’s December 2018 Temperature Summary. (ThorntonWeather.com)
Thornton, Colorado's December 2018 Precipitation Summary. (ThorntonWeather.com)
Thornton, Colorado’s December 2018 Precipitation Summary. (ThorntonWeather.com)
CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
936 AM MST TUE JAN 1 2019

...................................

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              79   12/05/1939
 LOW              -25   12/22/1990
                        12/24/1876
HIGHEST            63   12/21        62       1       69  12/12
LOWEST              0   12/31        -4       4       -4  12/24
AVG. MAXIMUM     46.1              42.8     3.3     48.3
AVG. MINIMUM     18.8              17.1     1.7     18.0
MEAN             32.5              30.0     2.5     33.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      4               5.8    -1.8        4
DAYS MIN <= 32     31              29.4     1.6       28
DAYS MIN <= 0       1               2.0    -1.0        1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.21   1913
 MINIMUM         0.00   1881
TOTALS           0.03              0.35   -0.32     0.21
DAILY AVG.       0.00              0.01   -0.01     0.01
DAYS >= .01         1               4.1    -3.1        4
DAYS >= .10         0               1.1    -1.1        1
DAYS >= .50         0               0.1    -0.1        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.03   12/31 TO 12/31

SNOWFALL (INCHES)
TOTALS            0.5               8.5

DEGREE_DAYS
HEATING TOTAL     999              1086     -87      979
 SINCE 7/1       2372              2468     -96     2150
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1026               769     257      881

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.6
RESULTANT WIND SPEED/DIRECTION   2/222
HIGHEST WIND SPEED/DIRECTION    39/010    DATE  12/12
HIGHEST GUST SPEED/DIRECTION    53/010    DATE  12/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     51

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

Thornton’s January 2019 preview: Cold temps the norm, snow can be fleeting

Denver's January weather and climatology preview for 2013.As we begin the new year the winter chill begins to set in.  While January can see its share of extremes, the month historically sees stable temperatures and is usually relatively dry.

January ranks as the second coldest month in Denver next to December with average temperatures remaining virtually the same from the start to the end of the month.

In terms of snowfall, the month only ranks as the fourth snowiest and it is not uncommon for it to be quite dry.

What does January 2019 hold for us?  Follow the link to find out.

For the complete January preview including a look at historical averages and extremes, click here. 

December 2018 top shots: Monthly photo slideshow

A beautiful sunset over downtown Denver to start the month of December. (Alisa H)
A beautiful sunset over downtown Denver to start the month of December. (Alisa H)

The month of December can offer everything from bone dry conditions to bone chilling cold and monstrous snowstorms.  The weather and wildlife all afford an abundance of photo opportunities as our December photo slideshow shows.

Leaves have fallen from trees now and the landscape can sometimes look quite stark.  However it only takes a quick shot of snow to change that picture greatly.  Throw in gorgeous sunrises and sunsets, plenty of wildlife big and small, kids playing and much more and the month can be quite colorful and eventful.

  • Slideshow updated December 31, 2018
  • To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather-related imagery.

Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted in images captured from yours and our cameras.

[flickr_set id=”72157702984201741″]

What is missing in the slideshow above?  Your photo!

Our monthly photo slideshow is going to feature images that we have taken but more importantly images that you have captured.  The photos can be of anything even remotely weather-related.

Landscapes, current conditions, wildlife, pets, kids.  Whimsical, newsy, artsy.  Taken at the zoo, some other area attraction, a local park, a national park or your backyard.  You name it, we want to see and share it!

Images can be taken in Thornton, Denver or anywhere across the extraordinary Centennial State.  We’ll even take some from out of state if we can tie it to Colorado somehow.

We’ll keep the criteria very open to interpretation with just about any image eligible to be shown in our slideshows.

What do you win for having your image in our slideshow?  We are just a ‘mom and pop’ outfit and make no money from our site so we really don’t have the means to provide prizes.  However you will have our undying gratitude and the satisfaction that your images are shared on the most popular website in Thornton.

To share you images with us and get them included in the slideshow just email them to us or share them with ThorntonWeather.com on any of the various social media outlets.  Links are provided below.

So come on, get those camera’s rolling!