88°F

Thornton, Colorado, USA

Updated: 11-Sep-2026 3:10pm

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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: Fri, 11-Sep-2026 12:46pm MDT

Thornton

This Afternoon Partly Sunny	Saturday Mostly Sunny then Slight Chance Showers And T-Storms	Sunday Mostly Sunny then Slight Chance Showers And T-Storms	Monday Mostly Sunny then Slight Chance Showers And T-Storms	Tuesday Showers And T-Storms Likely	Wednesday Partly Sunny then Chance Showers And T-Storms	Thursday Slight Chance Rain Showers then Slight Chance Showers And T-Storms
Hi 92 °F	Hi 85 °F	Hi 93 °F	Hi 89 °F	Hi 73 °F	Hi 82 °F	Hi 76 °F

Tonight Slight Chance Rain Showers then Partly Cloudy	Saturday Night Mostly Clear	Sunday Night Slight Chance Showers And T-Storms then Partly Cloudy	Monday Night Showers And T-Storms Likely	Tuesday Night Chance Showers And T-Storms then Mostly Cloudy	Wednesday Night Chance Showers And T-Storms	Thursday Night Slight Chance Rain Showers then Partly Cloudy
Lo 58 °F	Lo 60 °F	Lo 63 °F	Lo 56 °F	Lo 56 °F	Lo 57 °F	Lo 55 °F

This Afternoon	Partly sunny. High near 92, with temperatures falling to around 90 in the afternoon. North northwest wind 5 to 9 mph.
Tonight	A slight chance of rain showers before 9pm. Partly cloudy. Low around 58, with temperatures rising to around 60 overnight. West northwest wind 5 to 9 mph. Chance of precipitation is 20%.
Saturday	A slight chance of rain showers between 2pm and 3pm, then a slight chance of showers and thunderstorms. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. East northeast wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.
Saturday Night	Mostly clear, with a low around 60. South wind 3 to 8 mph.
Sunday	A slight chance of rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. South southeast wind 3 to 9 mph. Chance of precipitation is 20%.
Sunday Night	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Monday	A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
Monday Night	Showers and thunderstorms likely. Mostly cloudy, with a low around 56.
Tuesday	A chance of rain showers before noon, then showers and thunderstorms likely. Partly sunny, with a high near 73.
Tuesday Night	A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56.
Wednesday	A chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.
Wednesday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Thursday	A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Thursday Night	A slight chance of rain showers before midnight. Partly cloudy, with a low around 55.

Forecast from NOAA-NWS for Thornton, CO.