Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts

Adams County
 Details for Adams County Freeze Watch  +1 additional alert
 Thornton
 Details for Thornton Freeze Watch
Freeze Watch FREEZE WATCH - Adams County  - Thornton
Fire Weather Watch FIRE WEATHER WATCH - Adams County

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: 15-Apr-2026 @ 10:55pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 5.6°F than last hour.

51.2°F

24-hr diff: -9.1°FColder 9.1°F than yesterday at this time.
Cool
High Today
70.7°F
2:48 PM 		Low Today
40.0°F
6:51 AM
Yest High
61.7°F
11:26 AM 		Yest Low
46.4°F
5:00 AM
Sta* High
85.1°F
2008 		Sta* Low
22.3°F
2013
* This Station's Records Since 11/2006
Night time, Dry, A few clouds Night time, Dry, A few clouds

Wind from SW Wind:  SW
1.5
Gusting to:
 2.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
45.6 of 100
Tonight

Tonight: Mostly Clear
Mostly Clear
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Lo 42°F Hi 75°F Lo 36°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.1°F since last hour. 23.0°F
Last Hour: Decreased 0.1°F since last hour. -0.1°F
High 7:20 AM: 26.7°F
Low 11:58 AM: 16.8°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 41.0°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.01 in
Apr Rain: 0.08 in
Apr to Date
  Avg:10 		0.46 in
Apr to Date
  Diff from Avg:10 		Under 0.38 in for the month 0.38 in
Apr Avg: 1.52 in
Diff from Avg: Under 1.44 in for the month 1.44 in
Season:1 0.99 in
YTD
  Avg:11 		2.65 in
YTD
  Diff from Avg:11 		Under 1.66 in for the year 1.66 in
Last Rain
Time/Date: 		11-Apr-2026
at 6:24 PM
12 rain days in 2026
3 days in April
4 days since last rain
Current: SW  1.5 mph
1Hr Average: 2.2 mph
Wind Run: 98.77 miles
Wind Gust
Current: 2.0 mph
Today: 27.0 mph 12:25 PM
Month: 36.0 mph 3-Apr
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
13 h 14 m 18 s
of Sunlight Yesterday
13 h 16 m 49 s
of Sunlight Today Which is
2 min 31 sec longer than
yesterday
13 h 19 m 19 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Crescent
Waning Crescent, 28 days, 3 hours, 34 minutes in cycle
2%
Illuminated
Humidity Barometer
Current: Increased 6% since last hour. 33%
Last Hour: Increased 6% since last hour. 6%
High 6:53 AM: 53%
Low 2:12 PM: 14%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.011 inHg/hr 29.533 inHg
Last Hour: Steady
High 7:35 AM: 29.633
Low 5:03 PM: 29.513
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 17.3
Apr: 171.3
2026 to Date: 1984.5
Cooling Degree Days
2026 to Date: 24.2
Today: 0.00 in
Yesterday: 0.00 in
Apr Snow: Under 5.591 in for the month 0.00 in
Apr Avg: 5.59 in
Diff from Avg: -5.59 in
Season Total:2 18.60 in
Snow Depth: 0.00 in
0 snow days in April
10 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 51.2°F
Low 6:29 AM: 39.1°F
Yesterday: 42.7°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
N/A

No Data
Density:
1.23 kg/m3
UV Summary/Forecast Solar Summary
High Today:   6.4 @ 1:08 PM
Apr-16

6.5 		Apr-17

6.9 		Apr-18

6.3
High Today:  
863 W/m2 @ 1:02 PM
Sun Hours Today:
09:21
   This Month: 67:46 Hrs
Rise: 6:20 am  Set: 7:38 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 45.8°F
Sunrise: 6:20 am
Sunset: 7:38 pm
Moonrise: 5:37 am
Moonset: 5:48 pm
Full Moon: 01-Apr-2026
New Moon: 11:52 UTC
17-Apr-2026
Updated at Midnight
Current ET: 0.23 in
7-Days Rain: 0.01 in
7-Days ET: 1.12 in
7-Day: 1.108 in water in deficit of what evaporated in last 7 days. 1.108 in
April: 1.96 in water in deficit of what evaporated this month. 1.96 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:1 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.7 | 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.   10 Historical average only to day 15 of just the month of April for this station since 2007.   11 Historical average rain this season to day 15 of April for this station since 2007.
 NWS Weather Forecast  -   Outlook Tonight & Thursday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 42°F 		NWS forecast: Mostly clear. Low around 42, with temperatures rising to around 44 overnight. Southwest wind around 9 mph, with gusts as high as 16 mph.
 Thursday

Thursday: Mostly Sunny
Mostly Sunny

Hi 75°F 		NWS forecast: Mostly sunny, with a high near 75. South southwest wind 9 to 15 mph, with gusts as high as 23 mph.
 NWS Short Term Weather Forecast
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday

Friday: Snow Showers
Snow Showers
Friday
Night
Friday Night: Slight Chance Snow Showers then Mostly Cloudy
Slight Chance Snow Showers then Mostly Cloudy
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Lo 36°F Hi 41°F Lo 24°F Hi 58°F Lo 31°F Hi 72°F Lo 42°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