Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts


No alerts
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: 27-May-2026 @ 11:45am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 2°F than last hour.

66.2°F

24-hr diff: -10°FColder 10°F than yesterday at this time.
Comfortable
High Today
67.4°F
11:29 AM 		Low Today
56.7°F
5:06 AM
Yest High
82.0°F
3:06 PM 		Yest Low
56.8°F
4:42 AM
Sta* High
90.3°F
2022 		Sta* Low
41.1°F
2009
* This Station's Records Since 11/2006
Cloudy, Dry Cloudy, Dry

Wind from E Wind:  E
1.8
Gusting to:
 4.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
15.3 of 100
Today

Today: Mostly Cloudy then Showers And Thunderstorms Likely
Mostly Cloudy then Showers And T-Storms Likely
Tonight

Tonight: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Thursday

Thursday: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Hi 72°F Lo 54°F Hi 79°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.3°F since last hour. 48.6°F
Last Hour: Increased 0.3°F since last hour. +0.3°F
High 11:29 AM: 50.2°F
Low 2:19 AM: 43.9°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 56.9°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.05 in
May Rain: 1.66 in
May to Date
  Avg:10 		2.79 in
May to Date
  Diff from Avg:10 		Under 1.13 in for the month 1.13 in
May Avg: 2.98 in
Diff from Avg: Under 1.32 in for the month 1.32 in
Season:1 3.01 in
YTD
  Avg:11 		6.45 in
YTD
  Diff from Avg:11 		Under 3.44 in for the year 3.44 in
Last Rain
Time/Date: 		22-May-2026
at 1:39 AM
25 rain days in 2026
9 days in May
5 days since last rain
Current: E  1.8 mph
1Hr Average: 4.7 mph
Wind Run: 44.51 miles
Wind Gust
Current: 4.0 mph
Today: 15.0 mph 8:29 AM
Month: 41.1 mph 9-May
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 41 m 45 s
of Sunlight Yesterday
14 h 43 m 7 s
of Sunlight Today Which is
1 min 22 sec longer than
yesterday
14 h 44 m 27 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waxing Gibbous
Waxing Gibbous, 10 days, 21 hours, 48 minutes in cycle
88%
Illuminated
Humidity Barometer
Current: Decreased 3% since last hour. 53%
Last Hour: Decreased 3% since last hour. 3%
High 4:58 AM: 65%
Low 11:30 AM: 50%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.006 inHg/hr 29.588 inHg
Last Hour: Steady
High 11:41 AM: 29.591
Low 12:24 AM: 29.423
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Cooling Degree Days Snow3 Heat Index Air
Today: 0.0
May: 35.7
2026 to Date: 68.4
Heating Degree Days
2026 to Date: 2407.3
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: 66.2°F
High 11:29am: 67.4°F
Yesterday: 80.3°F
Record: 102.9°F
8-Jul-2021
Quality
Index6:
58

Moderate
Density:
1.19 kg/m3
Current UV Index Current Solar Energy9
2.2
Sunburn in
51 Minutes 		Highest:
11:21 AM
5.2
267 W/m2
27%
W/m2 ⇒ SI 		High Today:
11:20 AM
 619  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 48.6°F
Sunrise: 5:35 am
Sunset: 8:17 pm
Moonrise: 5:14 pm
Moonset: 3:14 am
Full Moon: 31-May-2026
New Moon: 02:55 UTC
14-Jun-2026
Updated at Midnight
Current ET: 0.11 in
7-Days Rain: 0.05 in
7-Days ET: 1.57 in
7-Day: 1.521 in water in deficit of what evaporated in last 7 days. 1.521 in
May: 3.48 in water in deficit of what evaporated this month. 3.48 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:19 | 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 27 of just the month of May for this station since 2006.   11 Historical average rain this season to day 27 of May for this station since 2006.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Mostly Cloudy then Showers And Thunderstorms Likely
Mostly Cloudy then Showers And T-Storms Likely

Hi 72°F 		NWS forecast: Showers and thunderstorms likely after noon. Mostly cloudy. High near 72, with temperatures falling to around 69 in the afternoon. Southeast wind 6 to 12 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
 Tonight

Tonight: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy

Lo 54°F 		NWS forecast: A chance of showers and thunderstorms before midnight. Mostly cloudy. Low around 54, with temperatures rising to around 58 overnight. South southeast wind 1 to 12 mph, with gusts as high as 16 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Thursday

Thursday: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Friday

Friday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms 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 then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Hi 79°F Lo 54°F Hi 83°F Lo 53°F Hi 81°F Lo 52°F Hi 82°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