Forecast for Thornton, Colorado

Today's Weather Story   
48 Hour Graphical Forecast   
National Weather Service Forecast for: Thornton, CO
Issued by: National Weather Service Denver/Boulder, CO
Updated: Sun, 02-Aug-2026 4:38am MDT

Thornton
 
Today

Today: Sunny
Sunny
Monday

Monday: Patchy Smoke then Slight Chance Showers And Thunderstorms
Patchy Smoke then Slight Chance Showers And T-Storms
Tuesday

Tuesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Sunny
Sunny
 
Hi 101 °F Hi 100 °F Hi 83 °F Hi 88 °F Hi 95 °F Hi 98 °F Hi 98 °F  
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Patchy Smoke
Slight Chance Showers And T-Storms then Patchy Smoke
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
 
Lo 70 °F Lo 63 °F Lo 61 °F Lo 62 °F Lo 65 °F Lo 68 °F Lo 69 °F  

Heat Advisory issued August 2 at 2:55AM MDT until August 3 at 9:00PM MDT
Air Quality Alert issued August 1 at 10:10PM MDT
Air Quality Alert issued August 1 at 6:10PM MDT
Air Quality Alert issued August 1 at 4:10PM MDT
 

Today
 
Sunny, with a high near 101. South southeast wind 2 to 8 mph.
Tonight
 
Mostly clear. Low around 70, with temperatures rising to around 72 overnight. South wind 6 to 16 mph, with gusts as high as 25 mph.
Monday
 
Patchy smoke between 10am and 2pm, then a slight chance of showers and thunderstorms. Mostly sunny. High near 100, with temperatures falling to around 94 in the afternoon. North wind 3 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Monday Night
 
A slight chance of showers and thunderstorms before 10pm, then patchy smoke and a slight chance of rain showers between 10pm and 1am. Partly cloudy, with a low around 63. North wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tuesday
 
A slight chance of rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. East northeast wind 6 to 9 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Tuesday Night
 
Partly cloudy, with a low around 61.
Wednesday
 
Sunny, with a high near 88.
Wednesday Night
 
Mostly clear, with a low around 62.
Thursday
 
Sunny, with a high near 95.
Thursday Night
 
Mostly clear, with a low around 65.
Friday
 
Sunny, with a high near 98.
Friday Night
 
Mostly clear, with a low around 68.
Saturday
 
Sunny, with a high near 98.
Saturday Night
 
Mostly clear, with a low around 69.

 

Forecast from NOAA-NWS for Thornton, CO.