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: 17-Nov-2025 @ 5:50pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.4°F than last hour.

51.1°F

24-hr diff: -5.2°FColder 5.2°F than yesterday at this time.
Cool
High Today
59.7°F
12:07 PM 		Low Today
48.2°F
6:02 AM
Yest High
71.1°F
2:21 PM 		Yest Low
36.6°F
4:51 AM
Sta* High
75.1°F
2008 		Sta* Low
15.2°F
2022
* This Station's Records Since 11/2006
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Wind from S Wind:  S
2.7
Gusting to:
 2.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
38.7 of 100
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Hi 59°F Lo 36°F Hi 62°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.3°F since last hour. 25.0°F
Last Hour: Increased 0.3°F since last hour. +0.3°F
High 12:00 AM: 35.9°F
Low 7:04 AM: 19.6°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 41.5°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Nov Rain: 0.00 in
Nov to Date
  Avg:10 		0.31 in
Nov to Date
  Diff from Avg:10 		Under 0.31 in for the month 0.31 in
Nov Avg: 0.50 in
Diff from Avg: Under 0.5 in for the month 0.50 in
Season:1 11.61 in
YTD
  Avg:11 		13.79 in
YTD
  Diff from Avg:11 		Under 2.18 in for the year 2.18 in
Last Rain
Time/Date: 		27-Oct-2025
at 5:54 PM
72 rain days in 2025
0 days in November
18 days since last rain
Current: S  2.7 mph
1Hr Average: 3.8 mph
Wind Run: 134.63 miles
Wind Gust
Current: 2.0 mph
Today: 36.0 mph 12:27 PM
Month: 37.0 mph 6-Nov
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 56 m 21 s
of Sunlight Yesterday
9 h 54 m 29 s
of Sunlight Today Which is
1 min 52 sec shorter than
yesterday
9 h 52 m 39 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Crescent
Waning Crescent, 27 days, 12 hours, 27 minutes in cycle
5%
Illuminated
Humidity Barometer
Current: Increased 1% since last hour. 36%
Last Hour: Increased 1% since last hour. 1%
High 12:14 AM: 58%
Low 9:55 AM: 24%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.031 inHg/hr 29.452 inHg
Last Hour: Rising slowly
High 5:37 PM: 29.457
Low 3:12 AM: 29.336
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 9.4
Nov: 214.0
2025 to Date: 4065.7
Cooling Degree Days
2025 to Date: 829.1
Today: 0.00 in
Yesterday: 0.00 in
Nov Snow: Under 5.748 in for the month 0.00 in
Nov Avg: 5.75 in
Diff from Avg: -5.75 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in November
0 snow days this season.2
First Snow of Season:
7-Jan-2025
Average 1st Snow:
27 of Oct
Current: 51.1°F
Low 6:13 AM: 43.4°F
Yesterday: 34.9°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
43

Good
Density:
1.22 kg/m3
UV Summary/Forecast Solar Summary
High Today:   2.8 @ 11:35 AM
Nov-18

2.1 		Nov-19

2.1 		Nov-20

2.0
High Today:  
708 W/m2 @ 11:36 AM
Sun Hours Today:
05:40
   This Month: 111:35 Hrs
Rise: 6:48 am  Set: 4:41 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 54.9°F
Sunrise: 6:48 am
Sunset: 4:41 pm
Moonrise: 5:22 am
Moonset: 3:26 pm
Full Moon: 05-Nov-2025
New Moon: 06:48 UTC
19-Nov-2025
Updated at Midnight
Current ET: 0.14 in
7-Days Rain: 0.00 in
7-Days ET: 0.53 in
7-Day: 0.531 in water in deficit of what evaporated in last 7 days. 0.531 in
November: 1.37 in water in deficit of what evaporated this month. 1.37 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 17 of just the month of November for this station since 2006.   11 Historical average rain this season to day 17 of November for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny

Hi 59°F 		NWS forecast: Mostly sunny. High near 59, with temperatures falling to around 54 in the afternoon. West wind 9 to 16 mph, with gusts as high as 23 mph.
 Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 36°F 		NWS forecast: Partly cloudy. Low around 36, with temperatures rising to around 38 overnight. West southwest wind around 7 mph.
 NWS Short Term Weather Forecast
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy then Slight Chance Light Rain
Partly Cloudy then Slight Chance Light Rain
Thursday

Thursday: Light Rain Likely
Light Rain Likely
Thursday
Night
Thursday Night: Rain And Snow Likely
Rain And Snow Likely
Friday

Friday: Chance Rain And Snow
Chance Rain And Snow
Hi 62°F Lo 35°F Hi 63°F Lo 35°F Hi 50°F Lo 36°F Hi 46°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