Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts

Adams County
 Details for Adams County Freeze Watch
 Thornton
 Details for Thornton Freeze Watch
Freeze Watch FREEZE 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: 17-May-2026 @ 3:50pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 0.1°F than last hour.

58.8°F

24-hr diff: -19.3°FColder 19.3°F than yesterday at this time.
Cool
High Today
67.6°F
12:16 PM 		Low Today
50.2°F
5:29 AM
Yest High
79.1°F
3:43 PM 		Yest Low
54.8°F
5:52 AM
Sta* High
87.3°F
2024 		Sta* Low
37.9°F
2016
* This Station's Records Since 11/2006
Mostly cloudy, Dry Mostly cloudy, Dry

Wind from E Wind:  E
6.7
Gusting to:
 6.0 mph
Current Rain Rain:
0.02 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
11.0 of 100
This
Afternoon
This Afternoon: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tonight

Tonight: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Monday

Monday: Rain Showers
Rain Showers
Hi 67°F Lo 41°F Hi 46°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 3.7°F since last hour. 43.6°F
Last Hour: Decreased 3.7°F since last hour. -3.7°F
High 2:25 PM: 49.9°F
Low 1:08 PM: 37.2°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 51.4°F
Rain Today
rain graph
Today: 0.02 in
Storm Rain: 0.02 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
May Rain: 0.93 in
May to Date
  Avg:10 		1.78 in
May to Date
  Diff from Avg:10 		Under 0.85 in for the month 0.85 in
May Avg: 2.98 in
Diff from Avg: Under 2.05 in for the month 2.05 in
Season:1 2.28 in
YTD
  Avg:11 		5.44 in
YTD
  Diff from Avg:11 		Under 3.16 in for the year 3.16 in
Last Rain
Time/Date: 		17-May-2026
at 2:17 PM
20 rain days in 2026
5 days in May
0 days since last rain
Current: E  6.7 mph
1Hr Average: 5.5 mph
Wind Run: 66.22 miles
Wind Gust
Current: 6.0 mph
Today: 18.4 mph 3:36 PM
Month: 41.1 mph 9-May
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 25 m 35 s
of Sunlight Yesterday
14 h 27 m 23 s
of Sunlight Today Which is
1 min 48 sec longer than
yesterday
14 h 29 m 9 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Crescent
Waxing Crescent, 1 days, 1 hours, 49 minutes in cycle
2%
Illuminated
Humidity Barometer
Current: Decreased 9% since last hour. 57%
Last Hour: Decreased 9% since last hour. 9%
High 2:23 PM: 77%
Low 12:16 PM: 36%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.007 inHg/hr 29.288 inHg
Last Hour: Steady
High 2:06 PM: 29.338
Low 12:03 AM: 29.215
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 5.3
May: 132.8
2026 to Date: 2316.0
Cooling Degree Days
2026 to Date: 57.8
Today: 0.00 in
Yesterday: 0.00 in
May Snow: Over 3.828 in for the month 5.60 in
May Avg: 1.77 in
Diff from Avg: 3.83 in
Season Total:2 28.00 in
Snow Depth: 0.00 in
2 snow days in May
13 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 57.9°F
Low 5:29 AM: 50.2°F
Yesterday: 54.8°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
61

Moderate
Density:
1.20 kg/m3
Current UV Index Current Solar Energy9
1.8
Sunburn in
62 Minutes 		Highest:
12:12 PM
7.2
313 W/m2
37%
W/m2 ⇒ SI 		High Today:
12:12 PM
 1013  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 48.1°F
Sunrise: 5:42 am
Sunset: 8:09 pm
Moonrise: 5:53 am
Moonset: 8:32 pm
Full Moon: 31-May-2026
New Moon: 02:55 UTC
14-Jun-2026
Updated at Midnight
Current ET: 0.17 in
7-Days Rain: 0.00 in
7-Days ET: 1.77 in
7-Day: 1.768 in water in deficit of what evaporated in last 7 days. 1.768 in
May: 2.36 in water in deficit of what evaporated this month. 2.36 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:5 | 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.   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 17 of just the month of May for this station since 2006.   11 Historical average rain this season to day 17 of May for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Hi 67°F 		NWS forecast: Showers and thunderstorms likely. Mostly cloudy. High near 67, with temperatures falling to around 60 in the afternoon. North northeast wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
 Tonight

Tonight: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Lo 41°F 		NWS forecast: Showers and thunderstorms likely. Cloudy. Low around 41, with temperatures rising to around 46 overnight. North northeast wind 6 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
 NWS Short Term Weather Forecast
Monday

Monday: Rain Showers
Rain Showers
Monday
Night
Monday Night: Chance Rain Showers then Slight Chance Rain And Snow Showers
Chance Rain Showers then Slight Chance Rain And Snow Showers
Tuesday

Tuesday: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Tuesday
Night
Tuesday Night: Rain Showers Likely
Rain Showers Likely
Wednesday

Wednesday: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Thursday

Thursday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Hi 46°F Lo 34°F Hi 50°F Lo 38°F Hi 60°F Lo 41°F Hi 67°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