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: 01-Sep-2026 @ 3:25am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.2°F than last hour.

61.8°F

24-hr diff: -0.7°FColder 0.7°F than yesterday at this time.
Comfortable
High Today
63.9°F
1:20 AM 		Low Today
61.8°F
3:17 AM
Yest High
85.9°F
5:15 PM 		Yest Low
60.2°F
6:24 AM
Sta* High
96.9°F
2023 		Sta* Low
44.8°F
2020
* This Station's Records Since 11/2006
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Calm Wind:  SSW
0.0
Gusting to:
 0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-0.7 of 100
Overnight

Overnight: Slight Chance Rain Showers
Slight Chance Rain Showers
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Lo 60°F Hi 87°F Lo 60°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.6°F since last hour. 57.9°F
Last Hour: Decreased 0.6°F since last hour. -0.6°F
High 1:57 AM: 59.0°F
Low 12:00 AM: 57.1°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 59.5°F
Rain Today
rain graph
Today: 0.00 in
Storm Rain: 0.08 in
Yesterday: 0.08 in
Last 7 Days: 0.19 in
Sep Rain: 0.00 in
Sep to Date
  Avg:10 		0.00 in
Sep to Date
  Diff from Avg:10 		No Change 0.00 in
Sep Avg: 1.48 in
Diff from Avg: Under 1.48 in for the month 1.48 in
Season:1 6.00 in
YTD
  Avg:11 		10.87 in
YTD
  Diff from Avg:11 		Under 4.87 in for the year 4.87 in
Last Rain
Time/Date: 		31-Aug-2026
at 9:18 PM
50 rain days in 2026
1 day in September
0 days since last rain
Current: SSW  0.0 mph
1Hr Average: 0.7 mph
Wind Run: 3.41 miles
Wind Gust
Current: 0.0 mph
Today: 11.5 mph 12:10 AM
Month: 11.0 mph 1-Sep
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
13 h 5 m 56 s
of Sunlight Yesterday
13 h 3 m 25 s
of Sunlight Today Which is
2 min 31 sec shorter than
yesterday
13 h 0 m 54 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Gibbous
Waning Gibbous, 19 days, 15 hours, 48 minutes in cycle
80%
Illuminated
Humidity Barometer
Current: Increased 2% since last hour. 87%
Last Hour: Increased 2% since last hour. 2%
High 2:34 AM: 87%
Low 12:14 AM: 80%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.007 inHg/hr 29.625 inHg
Last Hour: Steady
High 1:12 AM: 29.675
Low 3:24 AM: 29.625
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 0.2
Sep: 0.2
2026 to Date: 2417.0
Cooling Degree Days
2026 to Date: 991.8
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: 61.8°F
Low 3:17 AM: 61.8°F
Yesterday: 60.2°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
38

Good
Density:
1.20 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   4.2 @ 1:40 PM
Sep-01

8.1 		Sep-02

8.5 		Sep-03

7.8
High Yest:   566.0 @ 3:45 PM
Sun Hours Today:
00:00
   This Month: 203:17 Hrs
Rise: 6:27 am  Set: 7:32 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 58.9°F
Sunrise: 6:27 am
Sunset: 7:32 pm
Moonrise: 9:07 pm
Moonset: 11:18 am
Full Moon: 27-Aug-2026
New Moon: 03:28 UTC
10-Sep-2026
Updated at Midnight
Current ET: 0.01 in
7-Days Rain: 0.19 in
7-Days ET: 1.20 in
7-Day: 1.011 in water in deficit of what evaporated in last 7 days. 1.011 in
September: No Change 0 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
  100.7°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 1 of just the month of September for this station since 2006.   11 Historical average rain this season to day 1 of September for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Tuesday
Overnight

Overnight: Slight Chance Rain Showers
Slight Chance Rain Showers

Lo 60°F 		NWS forecast: A slight chance of rain showers before 3am. Mostly cloudy. Low around 60, with temperatures rising to around 63 overnight. Southwest wind around 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 Tuesday

Tuesday: Mostly Sunny
Mostly Sunny

Hi 87°F 		NWS forecast: Mostly sunny. High near 87, with temperatures falling to around 85 in the afternoon. South southwest wind around 3 mph.
 NWS Short Term Weather Forecast
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Lo 60°F Hi 90°F Lo 60°F Hi 92°F Lo 61°F Hi 92°F Lo 63°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