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: 04-Sep-2026 @ 3:55am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 2.9°F than last hour.

61.3°F

24-hr diff: -0.9°FColder 0.9°F than yesterday at this time.
Comfortable
High Today
69.4°F
12:11 AM 		Low Today
61.3°F
3:54 AM
Yest High
92.3°F
4:48 PM 		Yest Low
56.5°F
6:16 AM
Sta* High
96.0°F
2022 		Sta* Low
43.3°F
2011
* This Station's Records Since 11/2006
Night time, Dry, Clear skies Night time, Dry, Clear skies

Wind from WSW Wind:  WSW
0.8
Gusting to:
 1.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
11.2 of 100
Overnight

Overnight: Mostly Clear
Mostly Clear
Friday

Friday: Sunny then Slight Chance Rain Showers
Sunny then Slight Chance Rain Showers
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Lo 62°F Hi 95°F Lo 63°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.3°F since last hour. 45.9°F
Last Hour: Decreased 0.3°F since last hour. -0.3°F
High 1:44 AM: 48.8°F
Low 2:58 AM: 45.6°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 53.5°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.23 in
Sep Rain: 0.13 in
Sep to Date
  Avg:10 		0.04 in
Sep to Date
  Diff from Avg:10 		Over 0.09 in for the month 0.09 in
Sep Avg: 1.48 in
Diff from Avg: Under 1.35 in for the month 1.35 in
Season:1 6.13 in
YTD
  Avg:11 		10.91 in
YTD
  Diff from Avg:11 		Under 4.78 in for the year 4.78 in
Last Rain
Time/Date: 		2-Sep-2026
at 9:14 PM
50 rain days in 2026
1 day in September
1 day since last rain
Current: WSW  0.8 mph
1Hr Average: 0.4 mph
Wind Run: 3.47 miles
Wind Gust
Current: 1.0 mph
Today: 6.0 mph 2:40 AM
Month: 26.0 mph 1-Sep
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
12 h 58 m 23 s
of Sunlight Yesterday
12 h 55 m 50 s
of Sunlight Today Which is
2 min 33 sec shorter than
yesterday
12 h 53 m 18 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Last Quarter
Last Quarter, 22 days, 16 hours, 22 minutes in cycle
49%
Illuminated
Humidity Barometer
Current: Increased 5% since last hour. 57%
Last Hour: Increased 5% since last hour. 5%
High 1:44 AM: 58%
Low 12:08 AM: 44%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.006 inHg/hr 29.452 inHg
Last Hour: Steady
High 12:47 AM: 29.453
Low 1:47 AM: 29.434
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 0.0
Sep: 0.0
2026 to Date: 2416.8
Cooling Degree Days
2026 to Date: 1016.1
Today: 0.00 in
Yesterday: 0.00 in
Sep Snow: Under 0.118 in for the month 0.00 in
Sep Avg: 0.12 in
Diff from Avg: -0.12 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in September
0 snow days this season.2
First Snow of Season:
8-Jan-2026
Average 1st Snow:
29 of Oct
Current: 61.3°F
Low 3:54 AM: 61.3°F
Yesterday: 56.5°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
51

Moderate
Density:
1.20 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   7.2 @ 12:41 PM
Sep-04

8.5 		Sep-05

8.8 		Sep-06

8.9
High Yest:   816.0 @ 12:54 PM
Sun Hours Today:
00:00
   This Month: 24:49 Hrs
Rise: 6:30 am  Set: 7:27 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 59.1°F
Sunrise: 6:30 am
Sunset: 7:27 pm
Moonrise: 10:59 pm
Moonset: 2:51 pm
Full Moon: 27-Aug-2026
New Moon: 03:28 UTC
10-Sep-2026
Updated at Midnight
Current ET: 0.04 in
7-Days Rain: 0.23 in
7-Days ET: 1.25 in
7-Day: 1.022 in water in deficit of what evaporated in last 7 days. 1.022 in
September: 0.5 in water in deficit of what evaporated this month. 0.5 in
Support this Site!
Your donation helps support this site
HIGHS: LOWS:
104.4°F
25-Jul-2026 		-14.6°F
2-Feb-2011
Daytime Records
  100.8°F°F
02-Aug-2026 		  -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 4 of just the month of September for this station since 2006.   11 Historical average rain this season to day 4 of September for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Friday
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 62°F 		NWS forecast: Mostly clear, with a low around 62. West wind around 5 mph.
 Friday

Friday: Sunny then Slight Chance Rain Showers
Sunny then Slight Chance Rain Showers

Hi 95°F 		NWS forecast: A slight chance of rain showers after 3pm. Sunny. High near 95, with temperatures falling to around 92 in the afternoon. South southeast wind 3 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday

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

Sunday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Labor
Day
Labor Day: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Monday
Night
Monday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Lo 63°F Hi 92°F Lo 64°F Hi 92°F Lo 64°F Hi 91°F Lo 62°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