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: Tue, 23-Jun-2026 12:46am MDT

Thornton
 
  Tuesday

Tuesday: Areas Of Smoke
Areas Of Smoke
Wednesday

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

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

Friday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Saturday

Saturday: Sunny
Sunny
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Sunny
Sunny
  Hi 85 °F Hi 88 °F Hi 81 °F Hi 90 °F Hi 96 °F Hi 95 °F Hi 90 °F
 
Overnight

Overnight: Areas Of Smoke
Areas Of Smoke
Tuesday
Night
Tuesday Night: Areas Of Smoke
Areas Of Smoke
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Showers And Thunderstorms Likely then Mostly Cloudy
Showers And T-Storms Likely then Mostly Cloudy
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
 
Lo 59 °F Lo 57 °F Lo 58 °F Lo 56 °F Lo 60 °F Lo 62 °F Lo 60 °F  

Air Quality Alert issued June 22 at 4:10PM MDT
 

Overnight
 
Areas of smoke. Mostly clear. Low around 59, with temperatures rising to around 62 overnight. West wind around 6 mph.
Tuesday
 
Areas of smoke before 2pm, then areas of smoke and a chance of showers and thunderstorms. Some of the storms could be severe. Sunny. High near 85, with temperatures falling to around 82 in the afternoon. North northeast wind 5 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Tuesday Night
 
Areas of smoke and a chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy. Low around 57, with temperatures rising to around 61 overnight. East southeast wind 2 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Wednesday
 
A chance of showers and thunderstorms after 3pm. Some of the storms could be severe. Mostly sunny, with a high near 88. East northeast wind 2 to 12 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Wednesday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 58. North wind 3 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Thursday
 
Showers and thunderstorms after noon. Mostly cloudy, with a high near 81. Chance of precipitation is 80%.
Thursday Night
 
Showers and thunderstorms likely before midnight. Mostly cloudy, with a low around 56.
Friday
 
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90.
Friday Night
 
Partly cloudy, with a low around 60.
Saturday
 
Sunny, with a high near 96.
Saturday Night
 
Mostly clear, with a low around 62.
Sunday
 
Sunny, with a high near 95.
Sunday Night
 
Mostly clear, with a low around 60.
Monday
 
Sunny, with a high near 90.

 

Forecast from NOAA-NWS for Thornton, CO.