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: Sat, 09-May-2026 12:46am MDT

Thornton
 
Today

Today: Mostly Sunny
Mostly Sunny
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

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

Friday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
 
Hi 77 °F Hi 69 °F Hi 86 °F Hi 82 °F Hi 89 °F Hi 87 °F Hi 85 °F  
 
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Cloudy
Mostly Cloudy
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
 
Lo 45 °F Lo 46 °F Lo 53 °F Lo 53 °F Lo 57 °F Lo 54 °F Lo 54 °F  

 

Today
 
Mostly sunny. High near 77, with temperatures falling to around 75 in the afternoon. West northwest wind 8 to 17 mph, with gusts as high as 28 mph.
Tonight
 
A chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms. Mostly cloudy. Low around 45, with temperatures rising to around 48 overnight. North northwest wind 2 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
Sunny, with a high near 69. East southeast wind 1 to 6 mph.
Sunday Night
 
Mostly clear, with a low around 46. South southeast wind around 7 mph.
Monday
 
Sunny, with a high near 86. South southwest wind 5 to 8 mph, with gusts as high as 17 mph.
Monday Night
 
Mostly clear, with a low around 53.
Tuesday
 
Sunny, with a high near 82.
Tuesday Night
 
Mostly clear, with a low around 53.
Wednesday
 
Sunny, with a high near 89.
Wednesday Night
 
Mostly cloudy, with a low around 57.
Thursday
 
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87.
Thursday Night
 
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.
Friday
 
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 85.
Friday Night
 
Partly cloudy, with a low around 54.

 

Forecast from NOAA-NWS for Thornton, CO.