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: 08-May-2025 @ 10:55pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 2.3°F than last hour.

54.5°F

24-hr diff: 7.5°FWarmer 7.5°F than yesterday at this time.
Cool
High Today
70.5°F
5:01 PM 		Low Today
39.2°F
6:33 AM
Yest High
57.0°F
2:12 PM 		Yest Low
43.0°F
12:00 AM
Sta* High
86.8°F
2011 		Sta* Low
30.6°F
2010
* This Station's Records Since 11/2006
Night time, Dry, Clear skies Night time, Dry, Clear skies

Wind from SE Wind:  SE
0.4
Gusting to:
 0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
7.1 of 100
Tonight

Tonight: Mostly Clear
Mostly Clear
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Lo 45°F Hi 74°F Lo 47°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: No Change 41.7°F
Last Hour: No Change +0.0°F
High 1:04 PM: 43.8°F
Low 4:43 PM: 32.9°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 48.5°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.86 in
Last 7 Days: 1.55 in
May Rain: 1.55 in
May to Date
  Avg:10 		0.71 in
May to Date
  Diff from Avg:10 		Over 0.84 in for the month 0.84 in
May Avg: 2.98 in
Diff from Avg: Under 1.43 in for the month 1.43 in
Season:1 4.19 in
YTD
  Avg:11 		4.49 in
YTD
  Diff from Avg:11 		Under 0.3 in for the year 0.30 in
Last Rain
Time/Date: 		7-May-2025
at 12:01 PM
27 rain days in 2025
3 days in May
0 days since last rain
Current: SE  0.4 mph
1Hr Average: 2.9 mph
Wind Run: 55.22 miles
Wind Gust
Current: 0.0 mph
Today: 14.0 mph 11:57 AM
Month: 28.0 mph 5-May
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 11 m 19 s
of Sunlight Yesterday
14 h 13 m 23 s
of Sunlight Today Which is
2 min 4 sec longer than
yesterday
14 h 15 m 27 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Gibbous
Waxing Gibbous, 11 days, 9 hours, 26 minutes in cycle
89%
Illuminated
Humidity Barometer
Current: Increased 5% since last hour. 62%
Last Hour: Increased 5% since last hour. 5%
High 6:48 AM: 90%
Low 4:33 PM: 26%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.005 inHg/hr 29.944 inHg
Last Hour: Steady
High 8:01 AM: 30.021
Low 6:50 PM: 29.895
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 15.9
May: 99.3
2025 to Date: 3232.1
Cooling Degree Days
2025 to Date: 3.5
Today: 0.00 in
Yesterday: 0.00 in
May Snow: Under 1.575 in for the month 0.00 in
May Avg: 1.57 in
Diff from Avg: -1.57 in
Season Total:2 36.90 in
Snow Depth: 0.00 in
0 snow days in May
20 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 54.5°F
Low 5:17 AM: 38.4°F
Yesterday: 39.8°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:   7.5 @ 12:32 PM
May-09

8.4 		May-10

9.4 		May-11

8.8
High Today:  
881 W/m2 @ 12:49 PM
Sun Hours Today:
08:08
   This Month: 40:08 Hrs
Rise: 5:50 am  Set: 8:01 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 39.8°F
Sunrise: 5:50 am
Sunset: 8:01 pm
Moonrise: 5:34 pm
Moonset: 4:14 am
Full Moon: 12-May-2025
New Moon: 03:03 UTC
26-May-2025
Updated at Midnight
Current ET: 0.19 in
7-Days Rain: 1.55 in
7-Days ET: 1.06 in
7-Day: 0.491 in water in excess of what evaporated in last 7 days. 0.491 in
May: 0.49 in water in excess of what evaporated this month. 0.49 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 8 of just the month of May for this station since 2006.   11 Historical average rain this season to day 8 of May for this station since 2006.
 NWS Weather Forecast  -   Outlook Tonight & Friday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 45°F 		NWS forecast: Mostly clear. Low around 45, with temperatures rising to around 47 overnight. South southwest wind around 6 mph.
 Friday

Friday: Mostly Sunny
Mostly Sunny

Hi 74°F 		NWS forecast: Mostly sunny, with a high near 74. Northwest wind 2 to 8 mph.
 NWS Short Term Weather Forecast
Friday
Night
Friday Night: Partly Cloudy
Partly 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
Monday

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Lo 47°F Hi 78°F Lo 50°F Hi 84°F Lo 55°F Hi 85°F Lo 54°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