Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts

Adams County
 Details for Adams County Cold Weather Advisory
Cold Weather Advisory COLD WEATHER ADVISORY - 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: 23-Jan-2026 @ 5:20am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.8°F than last hour.

8.3°F

Wind Chill:  -7.5°F
24-hr diff: -6.9°FColder 6.9°F than yesterday at this time.
Extreme Cold
High Today
18.6°F
12:08 AM 		Low Today
8.3°F
5:14 AM
Yest High
39.2°F
2:00 PM 		Yest Low
14.0°F
7:09 AM
Sta* High
60.2°F
2016 		Sta* Low
5.2°F
2014
* This Station's Records Since 11/2006
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Wind from N Wind:  N
12.8
Gusting to:
 12.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-1.7 of 100
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy
Friday

Friday: Cloudy then Chance Light Snow
Cloudy then Chance Light Snow
Friday
Night
Friday Night: Light Snow Likely
Light Snow Likely
Lo 9°F Hi 15°F Lo 5°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.3°F since last hour. 3.1°F
Last Hour: Increased 0.3°F since last hour. +0.3°F
High 12:07 AM: 9.4°F
Low 3:54 AM: 2.4°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 7.4°F
Rain Today
rain graph
Melt Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.04 in
Jan Rain: 0.23 in
Jan to Date
  Avg:10 		0.29 in
Jan to Date
  Diff from Avg:10 		Under 0.06 in for the month 0.06 in
Jan Avg: 0.42 in
Diff from Avg: Under 0.19 in for the month 0.19 in
Season:1 0.23 in
YTD
  Avg:11 		0.29 in
YTD
  Diff from Avg:11 		Under 0.06 in for the year 0.06 in
Last Rain
Time/Date: 		19-Jan-2026
at 5:03 AM
3 rain days in 2026
3 days in January
3 days since last rain
Current: N  12.8 mph
1Hr Average: 9.3 mph
Wind Run: 47.86 miles
Wind Gust
Current: 12.0 mph
Today: 19.6 mph 1:30 AM
Month: 38.0 mph 16-Jan
Year: 38.0 mph 16-Jan
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 51 m 43 s
of Sunlight Yesterday
9 h 53 m 33 s
of Sunlight Today Which is
1 min 50 sec longer than
yesterday
9 h 55 m 25 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Crescent
Waxing Crescent, 4 days, 16 hours, 31 minutes in cycle
23%
Illuminated
Humidity Barometer
Current: Increased 4% since last hour. 79%
Last Hour: Increased 4% since last hour. 4%
High 5:02 AM: 79%
Low 12:00 AM: 66%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.028 inHg/hr 30.224 inHg
Last Hour: Rising slowly
High 5:18 AM: 30.224
Low 12:28 AM: 30.122
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 10.2
Jan: 559.5
2026 to Date: 558.2
Cooling Degree Days
2026 to Date: 0.0
Today: 0.00 in
Yesterday: 0.00 in
Jan Snow: Under 3.611 in for the month 3.20 in
Jan Avg: 6.81 in
Diff from Avg: -3.61 in
Season Total:2 10.40 in
Snow Depth: 0.00 in
3 snow days in January
6 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: -7.5°F
Low 5:17 AM: -8.2°F
Yesterday: 8.6°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
31

Good
Density:
1.37 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   1.3 @ 11:57 AM
Jan-23

2.2 		Jan-24

2.0 		Jan-25

1.8
High Yest:   522.0 @ 12:08 PM
Sun Hours Today:
00:00
   This Month: 118:28 Hrs
Rise: 7:15 am  Set: 5:07 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Early Morning
YTD Avg Temp: 38.8°F
Sunrise: 7:15 am
Sunset: 5:07 pm
Moonrise: 9:44 am
Moonset: 9:21 pm
Full Moon: 01-Feb-2026
New Moon: 12:02 UTC
17-Feb-2026
Updated at Midnight
Current ET: 0.02 in
7-Days Rain: 0.04 in
7-Days ET: 0.35 in
7-Day: 0.314 in water in deficit of what evaporated in last 7 days. 0.314 in
January: 0.85 in water in deficit of what evaporated this month. 0.85 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: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 23 of just the month of January for this station since 2006.   11 Historical average rain this season to day 23 of January for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Friday
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy

Lo 9°F 		NWS forecast: Mostly cloudy. Low around 9, with temperatures rising to around 12 overnight. North wind around 8 mph.
 Friday

Friday: Cloudy then Chance Light Snow
Cloudy then Chance Light Snow

Hi 15°F 		NWS forecast: A chance of snow after noon. Cloudy. High near 15, with temperatures falling to around 13 in the afternoon. Wind chill values as low as -3. North northwest wind around 9 mph. Chance of precipitation is 30%.
 NWS Short Term Weather Forecast
Friday
Night
Friday Night: Light Snow Likely
Light Snow Likely
Saturday

Saturday: Light Snow Likely
Light Snow Likely
Saturday
Night
Saturday Night: Slight Chance Light Snow
Slight Chance Light Snow
Sunday

Sunday: Slight Chance Light Snow
Slight Chance Light Snow
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Lo 5°F Hi 22°F Lo 6°F Hi 24°F Lo 8°F Hi 47°F Lo 21°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