Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts


No alerts
No Warnings, Watches, or Advisories

Current Radar
Thornton, Colorado current radar
Click for larger view 		Current Webcam
Thornton, Colorado current webcam image
Click for larger view 		Latest News
powered by Surfing Waves
spacer
METRIC | IMPERIAL
Updated: 02-Jan-2025 @ 9:00am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 3.3°F than last hour.

26.3°F

Wind Chill:  24.8°F
24-hr diff: 8.2°FWarmer 8.2°F than yesterday at this time.
Uncomfortably Cold
High Today
27.9°F
2:08 AM 		Low Today
22.7°F
4:43 AM
Yest High
43.6°F
3:16 PM 		Yest Low
13.2°F
7:45 AM
Sta* High
64.1°F
2009 		Sta* Low
2.2°F
2019
* This Station's Records Since 11/2006
Sunny, Dry Sunny, Dry

Wind from SW Wind:  SW
1.9
Gusting to:
 0.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
0.8 of 100
Today

Today: Slight Chance Light Snow then Mostly Sunny
Slight Chance Light Snow then Mostly Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Friday

Friday: Mostly Sunny
Mostly Sunny
Hi 46°F Lo 24°F Hi 51°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 1.9°F since last hour. 18.5°F
Last Hour: Increased 1.9°F since last hour. +1.9°F
High 8:59 AM: 18.5°F
Low 4:39 AM: 15.2°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 24.0°F
Rain Today
rain graph
Melt Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.04 in
Jan Rain: 0.00 in
Jan to Date
  Avg:10 		0.02 in
Jan to Date
  Diff from Avg:10 		Under 0.02 in for the month 0.02 in
Jan Avg: 0.42 in
Diff from Avg: Under 0.42 in for the month 0.42 in
Season:1 0.00 in
YTD
  Avg:11 		0.02 in
YTD
  Diff from Avg:11 		Under 0.02 in for the year 0.02 in
Last Rain
Time/Date: 		31-Dec-2024
at 9:52 PM
0 rain days in 2025
0 days in January
1 day since last rain
Current: SW  1.9 mph
1Hr Average: 1.5 mph
Wind Run: 12.82 miles
Wind Gust
Current: 0.0 mph
Today: 8.1 mph 1:52 AM
Month: 26.0 mph 1-Jan
Year: 26.0 mph 1-Jan
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 27 m 31 s
of Sunlight Yesterday
9 h 28 m 16 s
of Sunlight Today Which is 45 sec longer than
yesterday
9 h 29 m 7 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Crescent
Waxing Crescent, 2 days, 17 hours, 33 minutes in cycle
9%
Illuminated
Humidity Barometer
Current: Decreased 4% since last hour. 72%
Last Hour: Decreased 4% since last hour. 4%
High 7:51 AM: 77%
Low 2:02 AM: 61%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.023 inHg/hr 30.379 inHg
Last Hour: Rising slowly
High 8:59 AM: 30.379
Low 1:11 AM: 30.298
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 14.1
Jan: 52.4
2025 to Date: 52.3
Cooling Degree Days
2025 to Date: 0.0
Today: 0.00 in
Yesterday: 0.00 in
Jan Snow: Under 6.457 in for the month 0.00 in
Jan Avg: 6.46 in
Diff from Avg: -6.46 in
Season Total:2 16.20 in
Snow Depth: 0.00 in
0 snow days in January
7 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 24.8°F
Low 8:20 AM: 16.9°F
Yesterday: 6.9°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
59

Moderate
Density:
1.33 kg/m3
Current UV Index Current Solar Energy9
0.5
Sunburn in
224 Minutes 		Highest:
8:47 AM
0.5
206 W/m2
100%
W/m2 ⇒ SI 		High Today:
8:51 AM
 213  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 26.1°F
Sunrise: 7:21 am
Sunset: 4:46 pm
Moonrise: 9:39 am
Moonset: 6:33 pm
Full Moon: 13-Jan-2025
New Moon: 12:37 UTC
29-Jan-2025
Updated at Midnight
Current ET: 0.01 in
7-Days Rain: 0.04 in
7-Days ET: 0.27 in
7-Day: 0.228 in water in deficit of what evaporated in last 7 days. 0.228 in
January: 0.02 in water in deficit of what evaporated this month. 0.02 in
Support this Site!
Your donation helps support this site
HIGHS: LOWS:
102.9°F
25-Jun-2012 		-14.6°F
2-Feb-2011
Daytime Records
  100.6°F°F
12-Jul-2024 		  -8.1°F°F
22-Dec-2022
Nitetime Records
  88.0°F°F
15-Aug-2012 		  -10.7°F°F
02-Feb-2011
ICN:5 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.8 | RCP:99%
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 5AM and 5PM.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Colorado Department of Public Health & Environment.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 2 of just the month of January for this station since 2007.   11 Historical average rain this season to day 2 of January for this station since 2007.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Slight Chance Light Snow then Mostly Sunny
Slight Chance Light Snow then Mostly Sunny

Hi 46°F 		NWS forecast: A slight chance of snow before 11am. Mostly sunny. High near 46, with temperatures falling to around 39 in the afternoon. Northwest wind 3 to 9 mph. Chance of precipitation is 20%.
 Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 24°F 		NWS forecast: Partly cloudy, with a low around 24. South southwest wind around 6 mph.
 NWS Short Term Weather Forecast
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Mostly Cloudy
Mostly Cloudy
Saturday

Saturday: Chance Rain And Snow
Chance Rain And Snow
Saturday
Night
Saturday Night: Chance Light Snow
Chance Light Snow
Sunday

Sunday: Partly Sunny
Partly Sunny
Sunday
Night
Sunday Night: Mostly Cloudy
Mostly Cloudy
Monday

Monday: Partly Sunny then Chance Light Snow
Partly Sunny then Chance Light Snow
Hi 51°F Lo 22°F Hi 41°F Lo 22°F Hi 40°F Lo 20°F Hi 41°F
Click here for the complete forecast.
ajax-dashboard6.php - Version 6.95h - 20-Feb-2023 - Script by: Scott of BurnsvilleWeatherLIVE.com
Now supported by Saratoga-weather.org Download