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, 26-Sep-2026 12:46pm MDT

Thornton
 
This
Afternoon
This Afternoon: Sunny
Sunny
Sunday

Sunday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Monday

Monday: Mostly Cloudy then Slight Chance Showers And Thunderstorms
Mostly Cloudy then Slight Chance Showers And T-Storms
Tuesday

Tuesday: Chance Rain Showers
Chance Rain Showers
Wednesday

Wednesday: Chance Rain Showers
Chance Rain Showers
Thursday

Thursday: Slight Chance Rain Showers
Slight Chance Rain Showers
Friday

Friday: Sunny
Sunny
 
Hi 83 °F Hi 84 °F Hi 78 °F Hi 68 °F Hi 72 °F Hi 73 °F Hi 79 °F  
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Slight Chance Rain Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
Monday
Night
Monday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
Tuesday
Night
Tuesday Night: Chance Rain Showers
Chance Rain Showers
Wednesday
Night
Wednesday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
 
Lo 53 °F Lo 58 °F Lo 55 °F Lo 51 °F Lo 51 °F Lo 49 °F Lo 51 °F  

 

This Afternoon
 
Sunny. High near 83, with temperatures falling to around 81 in the afternoon. South southeast wind 3 to 8 mph.
Tonight
 
Mostly clear, with a low around 53. South southwest wind 3 to 7 mph.
Sunday
 
A slight chance of rain showers after 5pm. Mostly sunny. High near 84, with temperatures falling to around 82 in the afternoon. South southeast wind 2 to 9 mph. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of rain showers before 9pm. Mostly cloudy, with a low around 58. South wind 5 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.
Monday
 
A slight chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 78. Southwest wind 2 to 6 mph. Chance of precipitation is 20%.
Monday Night
 
A slight chance of rain showers. Mostly cloudy, with a low around 55. Chance of precipitation is 20%.
Tuesday
 
A chance of rain showers before noon, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
Tuesday Night
 
A chance of rain showers. Mostly cloudy, with a low around 51.
Wednesday
 
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 72.
Wednesday Night
 
A slight chance of rain showers. Partly cloudy, with a low around 51.
Thursday
 
A slight chance of rain showers. Sunny, with a high near 73.
Thursday Night
 
Mostly clear, with a low around 49.
Friday
 
Sunny, with a high near 79.
Friday Night
 
Mostly clear, with a low around 51.

 

Forecast from NOAA-NWS for Thornton, CO.