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: 21-Jan-2026 @ 10:45am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 7.7°F than last hour.

41.5°F

24-hr diff: -7.7°FColder 7.7°F than yesterday at this time.
Cold
High Today
41.6°F
10:43 AM
Low Today
16.8°F
7:20 AM
Yest High
54.2°F
11:14 AM
Yest Low
18.6°F
6:47 AM
Sta* High
74.4°F
2009
Sta* Low
-0.6°F
2025
* This Station's Records Since 11/2006
Sunny, Dry Sunny, Dry

Wind from SE Wind:  SE
2.1

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

Today: Sunny
Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Hi 49°F Lo 14°F Hi 36°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 2.1°F since last hour. 15.8°F
Last Hour: Decreased 2.1°F since last hour. -2.1°F
High 9:01 AM: 18.2°F
Low 6:11 AM: 9.1°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 33.7°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.04 in
Jan Rain: 0.23 in
Jan to Date
  Avg:10
0.28 in
Jan to Date
  Diff from Avg:10
Under 0.05 in for the month 0.05 in
Jan Avg: 0.42 in
Diff from Avg: Under 0.19 in for the month 0.19 in
Season:1 0.23 in
YTD
  Avg:11
0.28 in
YTD
  Diff from Avg:11
Under 0.05 in for the year 0.05 in
Last Rain
Time/Date:
19-Jan-2026
at 5:03 AM
3 rain days in 2026
3 days in January
1 day since last rain
Current: SE  2.1 mph
1Hr Average: 3.1 mph
Wind Run: 42.80 miles
Wind Gust
Current: 4.0 mph
Today: 15.0 mph 1:47 AM
Month: 38.0 mph 16-Jan
Year: 38.0 mph 16-Jan
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 48 m 11 s
of Sunlight Yesterday
9 h 49 m 56 s
of Sunlight Today
Which is
1 min 45 sec longer than
yesterday
9 h 51 m 43 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 2 days, 21 hours, 57 minutes in cycle
9%
Illuminated
Humidity Barometer
Current: Decreased 17% since last hour. 35%
Last Hour: Decreased 17% since last hour. 17%
High 7:25 AM: 83%
Low 10:42 AM: 34%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.008  inHg/hr 30.009 inHg
Last Hour: Steady
High 12:00 AM: 30.047
Low 5:39 AM: 29.931
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 17.7
Jan: 494.8
2026 to Date: 493.6
Cooling Degree Days
2026 to Date: 0.0
Today: 0.00 in
Yesterday: 0.00 in
Jan Snow: Under 3.611 in for the month 3.20 in
Jan Avg: 6.81 in
Diff from Avg: -3.61 in
Season Total:2 10.40 in
Snow Depth: 0.00 in
3 snow days in January
6 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 41.3°F
Low 6:54 AM: 10.1°F
Yesterday: 12.1°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

55


Moderate
Density:
1.27 kg/m3
Current UV Index Current Solar Energy9
1.7
Sunburn in
66 Minutes
Highest:
10:41 AM
1.7
471 W/m2
100%
W/m2 SI
High Today:
10:44 AM
471  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 39.8°F
Sunrise: 7:16 am
Sunset: 5:05 pm
Moonrise: 8:58 am
Moonset: 7:06 pm
Full Moon: 01-Feb-2026
New Moon: 12:02 UTC
17-Feb-2026
Updated at Midnight
Current ET: 0.03 in
7-Days Rain: 0.04 in
7-Days ET: 0.40 in
7-Day:  0.362 in water in deficit of what evaporated in last 7 days. 0.362 in
January:  0.76 in water in deficit of what evaporated this month. 0.76 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 21 of just the month of January for this station since 2006.   11 Historical average rain this season to day 21 of January for this station since 2006.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Sunny
Sunny

Hi 49°F
NWS forecast: Sunny. High near 49, with temperatures falling to around 42 in the afternoon. Southeast wind around 7 mph.
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 14°F
NWS forecast: Partly cloudy. Low around 14, with temperatures rising to around 16 overnight. Northwest wind 2 to 6 mph.
 NWS Short Term Weather Forecast
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Chance Light Snow
Chance Light Snow
Friday

Friday: Chance Light Snow
Chance Light Snow
Friday
Night
Friday Night: Chance Light Snow
Chance Light Snow
Saturday

Saturday: Chance Light Snow
Chance Light Snow
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

Sunday: Sunny
Sunny
Hi 36°F Lo 8°F Hi 19°F Lo 2°F Hi 20°F Lo 6°F Hi 30°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