National Weather Service Forecast for: Stillwater, OK
Issued by: National Weather Service Norman, OK
Updated: Sat, 09-12-2026 8:12pm CDT

Stillwater, OK
 
  Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

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

Thursday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
Friday

Friday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Saturday

Saturday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
  Hi 101 °F Hi 100 °F Hi 100 °F Hi 97 °F Hi 94 °F Hi 90 °F Hi 84 °F
 
Tonight

Tonight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Clear
Clear
Monday
Night
Monday Night: Clear
Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms then Mostly Clear
Slight Chance Showers And T-Storms then Mostly Clear
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
 
Lo 72 °F Lo 75 °F Lo 76 °F Lo 74 °F Lo 73 °F Lo 68 °F Lo 64 °F  

Heat Advisory
 

Tonight
 
A slight chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 72. East southeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
Mostly sunny, with a high near 101. Heat index values as high as 106. South southeast wind 3 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
Clear, with a low around 75. Heat index values as high as 103. South wind around 10 mph.
Monday
 
Sunny, with a high near 100. Heat index values as high as 104. South wind 9 to 15 mph, with gusts as high as 23 mph.
Monday Night
 
Clear, with a low around 76. South wind around 15 mph, with gusts as high as 23 mph.
Tuesday
 
Sunny, with a high near 100.
Tuesday Night
 
Mostly clear, with a low around 74.
Wednesday
 
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Chance of precipitation is 20%.
Wednesday Night
 
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. Chance of precipitation is 20%.
Thursday
 
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Sunny, with a high near 94. Chance of precipitation is 20%.
Thursday Night
 
A slight chance of showers and thunderstorms. Mostly clear, with a low around 68. Chance of precipitation is 20%.
Friday
 
A slight chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Friday Night
 
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms. Mostly clear, with a low around 64. Chance of precipitation is 30%.
Saturday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Stillwater, OK.