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: 23-Dec-2025 @ 1:20am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.6°F than last hour.

51.2°F

Feels like:  48°F
24-hr diff: 7.3°FWarmer 7.3°F than yesterday at this time.
Cool
High Today
54.9°F
12:06 AM
Low Today
51.1°F
12:49 AM
Yest High
75.6°F
1:33 PM
Yest Low
38.0°F
7:43 AM
Sta* High
63.0°F
2021
Sta* Low
-11.2°F
2022
* This Station's Records Since 11/2006
Night time, Dry, Partly cloudy Night time, Dry, Partly cloudy

Wind from S Wind:  S
7.7

Gusting to:
7.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: HIGH Current CBI
Fire Danger:
89.0 of 100
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Hi 78°F Lo 38°F Hi 65°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 2.5°F since last hour. 11.4°F
Last Hour: Decreased 2.5°F since last hour. -2.5°F
High 12:12 AM: 14.7°F
Low 1:14 AM: 11.4°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 38.9°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Dec Rain: 0.51 in
Dec to Date
  Avg:10
0.26 in
Dec to Date
  Diff from Avg:10
Over 0.25 in for the month 0.25 in
Dec Avg: 0.39 in
Diff from Avg: Over 0.12 in for the month 0.12 in
Season:1 12.17 in
YTD
  Avg:11
14.22 in
YTD
  Diff from Avg:11
Under 2.05 in for the year 2.05 in
Last Rain
Time/Date:
5-Dec-2025
at 9:41 AM
77 rain days in 2025
2 days in December
18 days since last rain
Current: S  7.7 mph
1Hr Average: 6.4 mph
Wind Run: 9.64 miles
Wind Gust
Current: 7.0 mph
Today: 17.3 mph 12:03 AM
Month: 54.0 mph 17-Dec
Year: 54.0 mph 17-Dec
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
9 h 20 m 19 s
of Sunlight Yesterday
9 h 20 m 27 s
of Sunlight Today
Which is 8 sec longer than
yesterday
9 h 20 m 37 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 3 days, 6 hours, 38 minutes in cycle
11%
Illuminated
Humidity Barometer
Current: Decreased 1% since last hour. 20%
Last Hour: Decreased 1% since last hour. 1%
High 12:27 AM: 22%
Low 12:00 AM: 20%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.009  inHg/hr 29.787 inHg
Last Hour: Steady
High 1:17 AM: 29.789
Low 12:36 AM: 29.768
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 0.5
Dec: 482.4
2025 to Date: 4899.8
Cooling Degree Days
2025 to Date: 829.1
Today: 0.00 in
Yesterday: 0.00 in
Dec Snow: Under 3.913 in for the month 5.30 in
Dec Avg: 9.21 in
Diff from Avg: -3.91 in
Season Total:2 5.90 in
Snow Depth: 0.00 in
1 snow day in December
2 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 48.3°F
Low 12:49 AM: 51.1°F
Yesterday: 35.1°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

46


Good
Density:
1.24 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   2.2 @ 12:02 PM
Dec-23

1.8
Dec-24

1.7
Dec-25

1.8
High Yest:   476.0 @ 1:11 PM
Sun Hours Today:
00:00
   This Month: 99:07 Hrs
Rise: 7:18 am  Set: 4:39 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 53.5°F
Sunrise: 7:18 am
Sunset: 4:39 pm
Moonrise: 10:03 am
Moonset: 7:01 pm
Full Moon: 03-Jan-2026
New Moon: 19:53 UTC
18-Jan-2026
Updated at Midnight
Current ET: 0.12 in
7-Days Rain: 0.00 in
7-Days ET: 0.72 in
7-Day:  0.717 in water in deficit of what evaporated in last 7 days. 0.717 in
December:  1.16 in water in deficit of what evaporated this month. 1.16 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:100%
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 23 of just the month of December for this station since 2006.   11 Historical average rain this season to day 23 of December for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny

Hi 78°F
NWS forecast: Mostly sunny. High near 78, with temperatures falling to around 69 in the afternoon. West wind around 9 mph, with gusts as high as 22 mph.
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 38°F
NWS forecast: Partly cloudy. Low around 38, with temperatures rising to around 42 overnight. Southwest wind around 8 mph.
 NWS Short Term Weather Forecast
Tuesday

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

Wednesday: Partly Sunny
Partly Sunny
Wednesday
Night
Wednesday Night: Mostly Cloudy
Mostly Cloudy
Christmas
Day
Christmas Day: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Mostly Sunny
Mostly Sunny
Hi 65°F Lo 39°F Hi 66°F Lo 40°F Hi 69°F Lo 39°F Hi 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