Category Archives: Climatology

Denver sets record low temperature for February 23

Record Cold Temperatures

Well, our Arctic blast is now in the record books.

As measured at Denver International Airport, the low temperature in the Mile High City dropped to -7 degrees this morning. That pretty easily bests the previous record low for February 23 of -4 degrees set in 1899.

Here in Thornton we stayed just a bit warmer with a low of -4 degrees.

Thornton’s February 2022 weather preview: Temps begin to warm, snow can be elusive

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 a bit of a disappointment although January did help and the start of February offers some relief. February is only our sixth snowiest month so we can’t count on much else.

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. 

Thornton’s January 2022 preview: Cold temps, not much snow the norm

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 sixth snowiest and it is not uncommon for it to be quite dry.

What does January 2022 hold for us?  Follow the link to find out.

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

Denver ties record high temperature for December 1

Record High Temperature

Well, December looks to continue the mild, dry weather of the previous two months as we tied the 48 year old record high for the date.

As measured at Denver International Airport, the Mile High City’s high temperature topped out at 73 degrees. This ties the previous record high for the date last set in 1973. Here in Thornton we were actually a touch warmer with a high of 74 degrees.

We may very well follow today’s record with another tomorrow. The record high for December 2 is 74 degrees set way back in 1885. Forecast highs for tomorrow are expected to come close to matching today’s.

The Mile High City’s lack of snow is now one for the record books

As of today, Denver has broken the record for the latest measurable snowfall on record. The old record for latest snowfall was November 21 1934.

Today, it has been 215 days since the Mile High City has received measurable snowfall and we will lengthen that record. There is a slim chance for some snow Wednesday night but, as the National Weather Service said this morning, “It is likely Denver will not receive its first snowfall until December.”

Denver’s earliest snowfall on record was September 3, 1961. The average date of the first snow is October 18th.

November 2021 preview: The transition to winter begins

Thornton's November weather previewThe weather during the month of November in Denver metro area can offer just about anything.  While it is normally a quiet month, it can be prone to extremes.

November has historically been one of Denver’s snowiest months and major snowstorms are not entirely uncommon.  However conditions can also be quite dry.

Temperatures during the month continue to cool as we get closer to winter and by the end of the month the low temperatures routinely dip to 20 degrees or below.  At times it can in fact bring conditions more like what we see in January.

Get all the details on November’s weather and what we can expect in our complete preview here.

Thornton’s October 2021 preview: Generally calm conditions with our first freeze and snow

Thornton, Colorado October weather preview.With the first full month of fall here, October usually brings one of the quietest weather months in the Denver area with plenty of mild, sunny days and clear, cool nights.

October is historically the second sunniest month and conditions are generally calm.

However we also will usually see our first taste of winter during the month with the first freeze and first snowfall of the season.  Temperatures as well will start to drop and by the end of the month the average nighttime lows are below freezing.

For complete details on our historical October weather and what we can expect in the coming month, read our complete October weather preview here.

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Thornton’s September 2021 weather preview

Following an August that was unseasonably warm and dry, we find ourselves heading into September hoping for relief.  The month can bring plenty of rain and even our first snow of the season but more often than not, it is one of the most pleasant along the Colorado Front Range.

As temperatures start to drop, September usually reminds us that summer is at an end and fall is now here. Sunshine is predominant though as the month actually has the highest percentage of sun out of any month. Sunny days and clear, cool nights are the standard weather pattern for the month.

The month can bring extremes however.  We will of course forever remember 2013’s devastating floods brought on by record-setting rain.  Longtime residents might remember September 1971 which brought over 17 inches of snowfall.

Get a complete look at September’s weather and more details as to what we can expect this year here.

Denver sets new record high temperature for July 28

Record High Temperature

Another high temperature record in the books for summer 2021.

As measured at Denver International Airport, the Mile High City’s temperature topped out at 100 degrees today. This easily bests the record high for the date of 98 degrees set 145 years ago in 1876.

Here in Thornton, we matched the 100 degree mark. This was our fifth 100+ degree day of the year in Thornton, more than any other year in the past 15 since Thornton Weather came online.

Thornton’s July weather preview: Summer heat really kicks in, thunderstorms common

July

Change is of course the one constant in Denver’s weather but come July, things actually get pretty consistent.

The standard formula for a day in July is a sunny morning, clouds developing in the late morning and early afternoon. Come mid-afternoon, thunderstorms are rolling off of the foothills and into the metro area and the eastern plains. These storms do occasionally reach severe status containing hail, gusty winds and heavy downpours of rain.

Check out our July weather preview for a complete look at what is in store for the month ahead.