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Thornton, Colorado, USA

Updated: 25-Jul-2026 2:10pm

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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: Sat, 25-Jul-2026 1:02pm MDT

Thornton

This Afternoon Chance Showers And T-Storms	Sunday Mostly Sunny then Slight Chance Showers And T-Storms	Monday Partly Sunny then Chance Showers And T-Storms	Tuesday Mostly Sunny then Showers And T-Storms Likely	Wednesday Partly Sunny then Chance Showers And T-Storms	Thursday Mostly Sunny then Chance Showers And T-Storms	Friday Sunny then Slight Chance Showers And T-Storms
Hi 100 °F	Hi 101 °F	Hi 98 °F	Hi 94 °F	Hi 93 °F	Hi 94 °F	Hi 94 °F

Tonight Slight Chance Showers And T-Storms then Partly Cloudy	Sunday Night Slight Chance Showers And T-Storms then Mostly Cloudy	Monday Night Chance Showers And T-Storms then Mostly Cloudy	Tuesday Night Showers And T-Storms Likely	Wednesday Night Chance Showers And T-Storms then Mostly Cloudy	Thursday Night Slight Chance Showers And T-Storms then Partly Cloudy	Friday Night Slight Chance Showers And T-Storms then Partly Cloudy
Lo 69 °F	Lo 71 °F	Lo 66 °F	Lo 65 °F	Lo 65 °F	Lo 65 °F	Lo 65 °F

Heat Advisory issued July 25 at 12:59AM MDT until July 26 at 9:00PM MDT
Heat Advisory issued July 25 at 12:59AM MDT until July 25 at 9:00PM MDT
Heat Advisory issued July 24 at 8:40PM MDT until July 26 at 9:00PM MDT
Heat Advisory issued July 24 at 8:40PM MDT until July 25 at 9:00PM MDT
Air Quality Alert issued July 24 at 4:10PM MDT

This Afternoon	A chance of showers and thunderstorms after 3pm. Partly sunny. High near 100, with temperatures falling to around 96 in the afternoon. Southwest wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tonight	A slight chance of showers and thunderstorms before 9pm. Partly cloudy. Low around 69, with temperatures rising to around 72 overnight. Southwest wind 5 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.
Sunday	A slight chance of showers and thunderstorms after 3pm. Mostly sunny. High near 101, with temperatures falling to around 98 in the afternoon. North northwest wind 3 to 8 mph. Chance of precipitation is 20%.
Sunday Night	A slight chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 71. West southwest wind 3 to 8 mph. Chance of precipitation is 20%.
Monday	A chance of showers and thunderstorms after noon. Partly sunny, with a high near 98. Northwest wind 2 to 8 mph, with gusts as high as 17 mph. Chance of precipitation is 50%.
Monday Night	A chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms between 9pm and midnight. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Tuesday	Showers and thunderstorms likely after noon. Mostly sunny, with a high near 94.
Tuesday Night	Showers and thunderstorms likely. Mostly cloudy, with a low around 65.
Wednesday	A chance of showers and thunderstorms after noon. Partly sunny, with a high near 93.
Wednesday Night	A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 65.
Thursday	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 94.
Thursday Night	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65.
Friday	A slight chance of showers and thunderstorms after noon. Sunny, with a high near 94.
Friday Night	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 65.

Forecast from NOAA-NWS for Thornton, CO.