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: 22-Nov-2025 @ 11:55am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 0.9°F than last hour.

55.3°F

24-hr diff: 10.8°FWarmer 10.8°F than yesterday at this time.
Cool
High Today
57.1°F
11:35 AM
Low Today
31.5°F
7:21 AM
Yest High
48.0°F
2:28 PM
Yest Low
37.0°F
11:53 PM
Sta* High
72.2°F
2017
Sta* Low
11.9°F
2007
* This Station's Records Since 11/2006
Sunny, Dry Sunny, Dry

Wind from N Wind:  N
5.5

Gusting to:
4.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
19.6 of 100
Overnight

Overnight: Mostly Clear
Mostly Clear
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Lo 33°F Hi 59°F Lo 33°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.1°F since last hour. 35.9°F
Last Hour: Decreased 0.1°F since last hour. -0.1°F
High 11:51 AM: 35.9°F
Low 6:55 AM: 28.4°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 46.8°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.01 in
Last 7 Days: 0.03 in
Nov Rain: 0.03 in
Nov to Date
  Avg:10
0.36 in
Nov to Date
  Diff from Avg:10
Under 0.33 in for the month 0.33 in
Nov Avg: 0.50 in
Diff from Avg: Under 0.47 in for the month 0.47 in
Season:1 11.64 in
YTD
  Avg:11
13.84 in
YTD
  Diff from Avg:11
Under 2.2 in for the year 2.20 in
Last Rain
Time/Date:
21-Nov-2025
at 1:27 AM
74 rain days in 2025
2 days in November
1 day since last rain
Current: N  5.5 mph
1Hr Average: 1.6 mph
Wind Run: 19.97 miles
Wind Gust
Current: 4.0 mph
Today: 9.2 mph 5:02 AM
Month: 37.0 mph 6-Nov
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 47 m 23 s
of Sunlight Yesterday
9 h 45 m 43 s
of Sunlight Today
Which is
1 min 40 sec shorter than
yesterday
9 h 44 m 5 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 2 days, 12 hours, 10 minutes in cycle
6%
Illuminated
Humidity Barometer
Current: Decreased 2% since last hour. 48%
Last Hour: Decreased 2% since last hour. 2%
High 2:33 AM: 93%
Low 11:36 AM: 38%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.028  inHg/hr 30.036 inHg
Last Hour: Falling slowly
High 9:42 AM: 30.082
Low 12:56 AM: 29.924
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 14.2
Nov: 306.6
2025 to Date: 4158.0
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: 54.2°F
Low 2:45 AM: 30.1°F
Yesterday: 37.0°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

52


Moderate
Density:
1.24 kg/m3
Current UV Index Current Solar Energy9
2.2
Sunburn in
51 Minutes
Highest:
11:06 AM
2.2
476 W/m2
100%
W/m2 SI
High Today:
11:31 AM
478  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 54.7°F
Sunrise: 6:53 am
Sunset: 4:38 pm
Moonrise: 9:23 am
Moonset: 5:11 pm
Full Moon: 04-Dec-2025
New Moon: 01:44 UTC
19-Dec-2025
Updated at Midnight
Current ET: 0.04 in
7-Days Rain: 0.03 in
7-Days ET: 0.44 in
7-Day:  0.407 in water in deficit of what evaporated in last 7 days. 0.407 in
November:  1.64 in water in deficit of what evaporated this month. 1.64 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:0 | 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.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 22 of just the month of November for this station since 2006.   11 Historical average rain this season to day 22 of November for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Saturday
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 33°F
NWS forecast: Mostly clear. Low around 33, with temperatures rising to around 36 overnight. South southwest wind around 5 mph.
Saturday

Saturday: Sunny
Sunny

Hi 59°F
NWS forecast: Sunny. High near 59, with temperatures falling to around 51 in the afternoon. Southeast wind around 6 mph.
 NWS Short Term Weather Forecast
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday

Sunday: Chance Light Rain
Chance Light Rain
Sunday
Night
Sunday Night: Chance Light Rain
Chance Light Rain
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Lo 33°F Hi 54°F Lo 36°F Hi 57°F Lo 28°F Hi 42°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