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: 26-Dec-2025 @ 7:05am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 2.7°F than last hour.

30.7°F

Wind Chill:  30.7°F
24-hr diff: -8.9°FColder 8.9°F than yesterday at this time.
Cold
High Today
42.2°F
2:02 AM 		Low Today
30.6°F
7:00 AM
Yest High
74.4°F
1:59 PM 		Yest Low
36.7°F
5:02 AM
Sta* High
59.5°F
2020 		Sta* Low
0.4°F
2012
* This Station's Records Since 11/2006
Dawn, Dry, Partly cloudy Dawn, Dry, Partly cloudy

Calm Wind:  ESE
0.0
Gusting to:
 0.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
5.7 of 100
Overnight

Overnight: Mostly Clear
Mostly Clear
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Lo 38°F Hi 64°F Lo 35°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.2°F since last hour. 18.8°F
Last Hour: Increased 0.2°F since last hour. +0.2°F
High 6:07 AM: 19.5°F
Low 2:21 AM: 16.0°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 27.1°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 		0.31 in
Dec to Date
  Diff from Avg:10 		Over 0.2 in for the month 0.20 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 		14.27 in
YTD
  Diff from Avg:11 		Under 2.1 in for the year 2.10 in
Last Rain
Time/Date: 		5-Dec-2025
at 9:41 AM
77 rain days in 2025
2 days in December
21 days since last rain
Current: ESE  0.0 mph
1Hr Average: 0.4 mph
Wind Run: 11.21 miles
Wind Gust
Current: 0.0 mph
Today: 9.2 mph 1:52 AM
Month: 54.0 mph 17-Dec
Year: 54.0 mph 17-Dec
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 20 m 52 s
of Sunlight Yesterday
9 h 21 m 9 s
of Sunlight Today Which is 17 sec longer than
yesterday
9 h 21 m 32 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Crescent
Waxing Crescent, 6 days, 12 hours, 23 minutes in cycle
38%
Illuminated
Humidity Barometer
Current: Increased 7% since last hour. 61%
Last Hour: Increased 7% since last hour. 7%
High 6:56 AM: 61%
Low 12:00 AM: 36%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.017 inHg/hr 29.708 inHg
Last Hour: Steady
High 6:01 AM: 29.725
Low 4:23 AM: 29.686
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 7.7
Dec: 532.5
2025 to Date: 4949.1
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: 30.7°F
Low 6:59 AM: 26.4°F
Yesterday: 33.6°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
49

Good
Density:
1.28 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   2.6 @ 12:08 PM
Dec-26

1.7 		Dec-27

1.5 		Dec-28

1.2
High Yest:   559.0 @ 1:39 PM
Sun Hours Today:
00:00
   This Month: 110:41 Hrs
Rise: 7:20 am  Set: 4:41 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Early Morning
YTD Avg Temp: 53.5°F
Sunrise: 7:20 am
Sunset: 4:41 pm
Moonrise: 11:17 am
Moonset: 10:22 pm
Full Moon: 03-Jan-2026
New Moon: 19:53 UTC
18-Jan-2026
Updated at Midnight
Current ET: 0.01 in
7-Days Rain: 0.00 in
7-Days ET: 0.62 in
7-Day: 0.618 in water in deficit of what evaporated in last 7 days. 0.618 in
December: 1.38 in water in deficit of what evaporated this month. 1.38 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:81%
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 26 of just the month of December for this station since 2006.   11 Historical average rain this season to day 26 of December for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Friday
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 38°F 		NWS forecast: Mostly clear. Low around 38, with temperatures rising to around 41 overnight. Southwest wind around 10 mph, with gusts as high as 16 mph.
 Friday

Friday: Mostly Sunny
Mostly Sunny

Hi 64°F 		NWS forecast: Mostly sunny. High near 64, with temperatures falling to around 56 in the afternoon. South southwest wind 6 to 9 mph.
 NWS Short Term Weather Forecast
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday

Saturday: Mostly Sunny then Slight Chance Light Rain
Mostly Sunny then Slight Chance Light Rain
Saturday
Night
Saturday Night: Rain And Snow Likely
Rain And Snow Likely
Sunday

Sunday: Light Snow Likely
Light Snow Likely
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Lo 35°F Hi 59°F Lo 21°F Hi 30°F Lo 12°F Hi 40°F Lo 19°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