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: 14-Dec-2025 @ 10:15pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 6°F than last hour.

35.7°F

Wind Chill:  35.7°F
24-hr diff: 6.3°FWarmer 6.3°F than yesterday at this time.
Cold
High Today
68.0°F
1:54 PM 		Low Today
23.5°F
7:15 AM
Yest High
65.4°F
11:57 AM 		Yest Low
27.4°F
11:58 PM
Sta* High
67.3°F
2010 		Sta* Low
-10.0°F
2008
* This Station's Records Since 11/2006
Station Record High
Night time, Dry, A few clouds Night time, Dry, A few clouds

Wind from S Wind:  S
0.6
Gusting to:
 1.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
14.9 of 100
This
Afternoon
This Afternoon: Sunny
Sunny
Tonight

Tonight: Mostly Clear
Mostly Clear
Monday

Monday: Sunny
Sunny
Hi 62°F Lo 34°F Hi 65°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 2.9°F since last hour. 18.9°F
Last Hour: Decreased 2.9°F since last hour. -2.9°F
High 3:46 PM: 31.3°F
Low 10:13 PM: 18.9°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 30.3°F
Rain Today
rain graph
Melt Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Dec Rain: 0.51 in
Dec to Date
  Avg:10 		0.15 in
Dec to Date
  Diff from Avg:10 		Over 0.36 in for the month 0.36 in
Dec Avg: 0.39 in
Diff from Avg: Over 0.12 in for the month 0.12 in
Season:1 12.17 in
YTD
  Avg:11 		14.11 in
YTD
  Diff from Avg:11 		Under 1.94 in for the year 1.94 in
Last Rain
Time/Date: 		5-Dec-2025
at 9:41 AM
77 rain days in 2025
2 days in December
9 days since last rain
Current: S  0.6 mph
1Hr Average: 2.2 mph
Wind Run: 29.06 miles
Wind Gust
Current: 1.0 mph
Today: 9.2 mph 11:08 AM
Month: 42.0 mph 9-Dec
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 22 m 16 s
of Sunlight Yesterday
9 h 21 m 48 s
of Sunlight Today Which is 28 sec shorter than
yesterday
9 h 21 m 23 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Crescent
Waning Crescent, 24 days, 22 hours, 29 minutes in cycle
20%
Illuminated
Humidity Barometer
Current: Increased 5% since last hour. 50%
Last Hour: Increased 5% since last hour. 5%
High 5:47 AM: 87%
Low 1:57 PM: 17%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.01 inHg/hr 30.041 inHg
Last Hour: Steady
High 9:37 AM: 30.165
Low 9:31 PM: 30.024
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 30.0
Dec: 355.4
2025 to Date: 4773.4
Cooling Degree Days
2025 to Date: 829.1
Today: 0.00 in
Yesterday: 0.00 in
Dec Snow: Under 3.913 in for the month 5.30 in
Dec Avg: 9.21 in
Diff from Avg: -3.91 in
Season Total:2 5.90 in
Snow Depth: 0.00 in
1 snow day in December
2 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 35.7°F
Low 5:23 AM: 21.1°F
Yesterday: 23.8°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
N/A

No Data
Density:
1.29 kg/m3
UV Summary/Forecast Solar Summary
High Today:   2.3 @ 12:31 PM
Dec-15

1.8 		Dec-16

1.6 		Dec-17

1.7
High Today:  
501 W/m2 @ 10:55 AM
Sun Hours Today:
05:55
   This Month: 62:48 Hrs
Rise: 7:14 am  Set: 4:35 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 53.6°F
Sunrise: 7:14 am
Sunset: 4:35 pm
Moonrise: 3:15 am
Moonset: 1:30 pm
Full Moon: 04-Dec-2025
New Moon: 01:44 UTC
19-Dec-2025
Updated at Midnight
Current ET: 0.04 in
7-Days Rain: 0.00 in
7-Days ET: 0.66 in
7-Day: 0.661 in water in deficit of what evaporated in last 7 days. 0.661 in
December: 0.34 in water in deficit of what evaporated this month. 0.34 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:4.8 | RCP:97%
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 14 of just the month of December for this station since 2006.   11 Historical average rain this season to day 14 of December for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Sunny
Sunny

Hi 62°F 		NWS forecast: Sunny. High near 62, with temperatures falling to around 54 in the afternoon. North wind around 2 mph.
 Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 34°F 		NWS forecast: Mostly clear, with a low around 34. West southwest wind 3 to 7 mph.
 NWS Short Term Weather Forecast
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Mostly Sunny then Slight Chance Light Rain
Mostly Sunny then Slight Chance Light Rain
Wednesday
Night
Wednesday Night: Slight Chance Rain And Snow
Slight Chance Rain And Snow
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Hi 65°F Lo 36°F Hi 64°F Lo 37°F Hi 66°F Lo 33°F Hi 49°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