Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts

Adams County
 Details for Adams County Winter Weather Advisory
 Thornton
 Details for Thornton Winter Weather Advisory
Winter Weather Advisory WINTER WEATHER ADVISORY - Adams County  - Thornton

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: 20-Feb-2025 @ 9:40am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 1.8°F than last hour.

13.3°F

Wind Chill:  7.9°F
Feels like:  8°F
24-hr diff: 5.3°FWarmer 5.3°F than yesterday at this time.
Very Cold
High Today
15.5°F
9:14 AM 		Low Today
5.1°F
7:03 AM
Yest High
22.5°F
2:08 PM 		Yest Low
-0.6°F
6:44 AM
Sta* High
68.6°F
2024 		Sta* Low
-0.8°F
2018
* This Station's Records Since 11/2006
Mostly cloudy, Dry Mostly cloudy, Dry

Wind from NNW Wind:  NNW
3.1
Gusting to:
 5.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-0.9 of 100
Today

Today: Partly Sunny then Snow Likely
Partly Sunny then Snow Likely
Tonight

Tonight: Snow Likely
Snow Likely
Friday

Friday: Slight Chance Light Snow then Mostly Sunny
Slight Chance Light Snow then Mostly Sunny
Hi 28°F Lo 20°F Hi 41°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.4°F since last hour. 7.1°F
Last Hour: Decreased 0.4°F since last hour. -0.4°F
High 9:09 AM: 9.3°F
Low 6:49 AM: 2.0°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 12.0°F
Rain Today
rain graph
Melt Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.06 in
Feb Rain: 0.08 in
Feb to Date
  Avg:10 		0.48 in
Feb to Date
  Diff from Avg:10 		Under 0.4 in for the month 0.40 in
Feb Avg: 0.61 in
Diff from Avg: Under 0.53 in for the month 0.53 in
Season:1 0.38 in
YTD
  Avg:11 		0.90 in
YTD
  Diff from Avg:11 		Under 0.52 in for the year 0.52 in
Last Rain
Time/Date: 		16-Feb-2025
at 11:09 AM
9 rain days in 2025
4 days in February
4 days since last rain
Current: NNW  3.1 mph
1Hr Average: 1.9 mph
Wind Run: 9.33 miles
Wind Gust
Current: 5.0 mph
Today: 9.2 mph 9:27 AM
Month: 36.0 mph 5-Feb
Year: 37.0 mph 11-Jan
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
10 h 57 m 8 s
of Sunlight Yesterday
10 h 59 m 39 s
of Sunlight Today Which is
2 min 31 sec longer than
yesterday
11 h 2 m 9 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Last Quarter
Last Quarter, 22 days, 4 hours, 8 minutes in cycle
50%
Illuminated
Humidity Barometer
Current: Decreased 9% since last hour. 76%
Last Hour: Decreased 9% since last hour. 9%
High 7:14 AM: 88%
Low 9:15 AM: 74%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.022 inHg/hr 30.282 inHg
Last Hour: Falling slowly
High 12:00 AM: 30.366
Low 3:45 AM: 30.277
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 22.1
Feb: 739.4
2025 to Date: 1944.2
Cooling Degree Days
2025 to Date: 0.0
Today: 0.00 in
Yesterday: 0.00 in
Feb Snow: Under 5.787 in for the month 5.00 in
Feb Avg: 10.79 in
Diff from Avg: -5.79 in
Season Total:2 31.60 in
Snow Depth: 0.00 in
3 snow days in February
14 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 7.9°F
Low 5:30 AM: -2.6°F
Yesterday: -8.1°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
70

Moderate
Density:
1.36 kg/m3
Current UV Index Current Solar Energy9
1.4
Sunburn in
80 Minutes 		Highest:
9:05 AM
1.5
193 W/m2
38%
W/m2 ⇒ SI 		High Today:
9:08 AM
 448  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 26.4°F
Sunrise: 6:45 am
Sunset: 5:40 pm
Moonrise: 1:01 am
Moonset: 10:17 am
Full Moon: 12-Feb-2025
New Moon: 00:45 UTC
27-Feb-2025
Updated at Midnight
Current ET: 0.01 in
7-Days Rain: 0.06 in
7-Days ET: 0.20 in
7-Day: 0.145 in water in deficit of what evaporated in last 7 days. 0.145 in
February: 0.84 in water in deficit of what evaporated this month. 0.84 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:98%
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 20 of just the month of February for this station since 2006.   11 Historical average rain this season to day 20 of February for this station since 2006.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Partly Sunny then Snow Likely
Partly Sunny then Snow Likely

Hi 28°F 		NWS forecast: Snow likely after noon. Partly sunny. High near 28, with temperatures falling to around 25 in the afternoon. North wind 2 to 6 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
 Tonight

Tonight: Snow Likely
Snow Likely

Lo 20°F 		NWS forecast: Snow likely. Mostly cloudy. Low around 20, with temperatures rising to around 22 overnight. West northwest wind around 5 mph. Chance of precipitation is 60%. New snow accumulation of 3 to 5 inches possible.
 NWS Short Term Weather Forecast
Friday

Friday: Slight Chance Light Snow then Mostly Sunny
Slight Chance Light Snow then Mostly Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday

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

Monday: Mostly Sunny
Mostly Sunny
Hi 41°F Lo 20°F Hi 50°F Lo 28°F Hi 58°F Lo 36°F Hi 63°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