66°F

Thornton, Colorado, USA

Updated: 24-May-2026 10:05pm

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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: Sun, 24-May-2026 1:01pm MDT

Thornton

	Memorial Day Mostly Sunny then Chance Showers And T-Storms	Tuesday Partly Sunny then Slight Chance Showers And T-Storms	Wednesday Partly Sunny then Showers And T-Storms Likely	Thursday Mostly Sunny then Slight Chance Showers And T-Storms	Friday Mostly Sunny then Slight Chance Showers And T-Storms	Saturday Mostly Sunny then Chance Showers And T-Storms	Sunday Mostly Sunny then Chance Showers And T-Storms
	Hi 86 °F	Hi 83 °F	Hi 79 °F	Hi 81 °F	Hi 84 °F	Hi 79 °F	Hi 78 °F

Tonight Slight Chance Showers And T-Storms then Partly Cloudy	Monday Night Slight Chance Showers And T-Storms then Mostly Cloudy	Tuesday Night Slight Chance Showers And T-Storms then Mostly Cloudy	Wednesday Night Chance Showers And T-Storms	Thursday Night Slight Chance Showers And T-Storms then Partly Cloudy	Friday Night Chance Showers And T-Storms	Saturday Night Chance Showers And T-Storms then Partly Cloudy
Lo 53 °F	Lo 54 °F	Lo 54 °F	Lo 52 °F	Lo 54 °F	Lo 53 °F	Lo 53 °F

Tonight	A slight chance of showers and thunderstorms before 7pm. Partly cloudy. Low around 53, with temperatures rising to around 56 overnight. Southwest wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Memorial Day	A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 86, with temperatures falling to around 83 in the afternoon. South southeast wind 2 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Monday Night	A slight chance of showers and thunderstorms before 9pm. Mostly cloudy. Low around 54, with temperatures rising to around 57 overnight. South southwest wind 2 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday	A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 83. South wind 2 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Tuesday Night	A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. South southwest wind 2 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 20%.
Wednesday	Showers and thunderstorms likely after noon. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Wednesday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Thursday	A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
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. Mostly sunny, with a high near 84.
Friday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Saturday	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79.
Saturday Night	A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53.
Sunday	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78.

Forecast from NOAA-NWS for Thornton, CO.