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, 15-Aug-2026 12:46am MDT

Thornton
 
  Saturday

Saturday: Patchy Fog then Chance Showers And Thunderstorms
Patchy Fog then Chance Showers And T-Storms
Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
  Hi 82 °F Hi 85 °F Hi 88 °F Hi 92 °F Hi 86 °F Hi 90 °F Hi 91 °F
 
Overnight

Overnight: Patchy Fog
Patchy Fog
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
 
Lo 60 °F Lo 59 °F Lo 57 °F Lo 60 °F Lo 60 °F Lo 58 °F Lo 61 °F  

Flood Watch issued August 15 at 1:06AM MDT until August 15 at 10:00PM MDT
 

Overnight
 
Patchy fog after 3am. Mostly cloudy. Low around 60, with temperatures rising to around 63 overnight. South wind around 5 mph.
Saturday
 
Patchy fog before 9am, then a chance of showers and thunderstorms between noon and 4pm, then showers and thunderstorms likely. Partly sunny. High near 82, with temperatures falling to around 78 in the afternoon. North wind 3 to 9 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms between 9pm and 10pm, then a slight chance of showers and thunderstorms between 10pm and 3am. Partly cloudy. Low around 59, with temperatures rising to around 62 overnight. Northwest wind 2 to 7 mph. Chance of precipitation is 50%.
Sunday
 
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85. South southeast wind 2 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 30%.
Sunday Night
 
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 57. South wind 3 to 7 mph. Chance of precipitation is 20%.
Monday
 
Sunny, with a high near 88.
Monday Night
 
Partly cloudy, with a low around 60.
Tuesday
 
Mostly sunny, with a high near 92.
Tuesday Night
 
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Wednesday
 
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 86.
Wednesday Night
 
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58.
Thursday
 
Sunny, with a high near 90.
Thursday Night
 
Mostly clear, with a low around 61.
Friday
 
Sunny, with a high near 91.

 

Forecast from NOAA-NWS for Thornton, CO.