Red Flag Warning RED FLAG WARNING - Adams County  - Thornton
Fire Weather Watch FIRE WEATHER WATCH - Adams County  - Thornton

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-Apr-2026 @ 11:40pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 3.6°F than last hour.

70.0°F

Feels like:  73°F
24-hr diff: 17.9°FWarmer 17.9°F than yesterday at this time.
Comfortable
High Today
85.4°F
4:43 PM
Low Today
44.0°F
6:14 AM
Yest High
82.4°F
3:27 PM
Yest Low
37.5°F
3:49 AM
Sta* High
80.9°F
2022
Sta* Low
27.5°F
2021
* This Station's Records Since 11/2006
Station Record High
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Wind from SSW Wind:  SSW
5.7

Gusting to:
7.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: EXTREME Current CBI
Fire Danger:
115.0 of 100
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Lo 53°F Hi 83°F Lo 44°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 3.1°F since last hour. 21.7°F
Last Hour: Decreased 3.1°F since last hour. -3.1°F
High 10:46 AM: 30.1°F
Low 5:04 PM: 14.8°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 50.7°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.31 in
Apr Rain: 0.39 in
Apr to Date
  Avg:10
1.03 in
Apr to Date
  Diff from Avg:10
Under 0.64 in for the month 0.64 in
Apr Avg: 1.52 in
Diff from Avg: Under 1.13 in for the month 1.13 in
Season:1 1.30 in
YTD
  Avg:11
3.22 in
YTD
  Diff from Avg:11
Under 1.92 in for the year 1.92 in
Last Rain
Time/Date:
17-Apr-2026
at 3:01 PM
13 rain days in 2026
4 days in April
3 days since last rain
Current: SSW  5.7 mph
1Hr Average: 4.7 mph
Wind Run: 88.82 miles
Wind Gust
Current: 7.0 mph
Today: 26.5 mph 10:22 PM
Month: 36.0 mph 3-Apr
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
13 h 29 m 10 s
of Sunlight Yesterday
13 h 31 m 35 s
of Sunlight Today
Which is
2 min 25 sec longer than
yesterday
13 h 33 m 60 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 4 days, 17 hours, 53 minutes in cycle
29%
Illuminated
Humidity Barometer
Current: No Change 16%
Last Hour: No Change 0%
High 6:46 AM: 45%
Low 4:39 PM: 8%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.014  inHg/hr 29.411 inHg
Last Hour: Steady
High 7:25 AM: 29.680
Low 11:38 PM: 29.406
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Cooling Degree Days Snow3 Heat Index Air
Today: 0.4
Apr: 0.4
2026 to Date: 24.6
Heating Degree Days
2026 to Date: 2057.5
Today: 0.00 in
Yesterday: 0.00 in
Apr Snow: Under 1.948 in for the month 3.80 in
Apr Avg: 5.75 in
Diff from Avg: -1.95 in
Season Total:2 22.40 in
Snow Depth: 0.00 in
1 snow day in April
11 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 73.2°F
High 4:43pm: 82.2°F
Yesterday: 80.0°F
Record: 102.9°F
8-Jul-2021
Quality
Index6:

N/A


No Data
Density:
1.18 kg/m3
UV Summary/Forecast Solar Summary
High Today:   7.1 @ 12:44 PM
Apr-22

7.2
Apr-23

7.0
Apr-24

6.9
High Today:  
875 W/m2 @ 12:58 PM
Sun Hours Today:
08:34
   This Month: 106:29 Hrs
Rise: 6:11 am  Set: 7:44 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 46.2°F
Sunrise: 6:11 am
Sunset: 7:44 pm
Moonrise: 10:22 am
Moonset: 1:17 am
Full Moon: 01-May-2026
New Moon: 20:02 UTC
16-May-2026
Updated at Midnight
Current ET: 0.23 in
7-Days Rain: 0.31 in
7-Days ET: 1.27 in
7-Day:  0.962 in water in deficit of what evaporated in last 7 days. 0.962 in
April:  2.74 in water in deficit of what evaporated this month. 2.74 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:4.7 | 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 21 of just the month of April for this station since 2006.   11 Historical average rain this season to day 21 of April for this station since 2006.
 NWS Weather Forecast  -   Outlook Tonight & Wednesday
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy

Lo 53°F
NWS forecast: Mostly cloudy. Low around 53, with temperatures rising to around 55 overnight. South wind 6 to 9 mph, with gusts as high as 16 mph.
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny

Hi 83°F
NWS forecast: Mostly sunny. High near 83, with temperatures falling to around 81 in the afternoon. South southwest wind 6 to 21 mph, with gusts as high as 33 mph.
 NWS Short Term Weather Forecast
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday

Friday: Sunny then Slight Chance Rain Showers
Sunny then Slight Chance Rain Showers
Friday
Night
Friday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
Saturday

Saturday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Lo 44°F Hi 66°F Lo 39°F Hi 68°F Lo 36°F Hi 65°F Lo 39°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