National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Stillwater, Stillwater Regional Airport (KSWO)

Lat: 36.16°NLon: 97.09°WElev: 984ft.

Fair

80°F

27°C

Humidity 62%
Wind Speed NE 10 mph
Barometer 30.04 in (1015.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 27 Aug 9:53 pm CDT
Extended Forecast for

Sumner OK

  • Tonight

    Tonight: Mostly clear, with a low around 68. East wind 3 to 5 mph.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 94. East southeast wind 3 to 7 mph.

    High: 94 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 72. East southeast wind around 8 mph.

    Low: 72 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South wind 14 to 16 mph, with gusts as high as 24 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 76.

    Low: 76 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 68. East wind 3 to 5 mph.
Friday
Sunny, with a high near 94. East southeast wind 3 to 7 mph.
Friday Night
Clear, with a low around 72. East southeast wind around 8 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 8 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 77. South wind 14 to 16 mph, with gusts as high as 24 mph.
Sunday
Sunny and hot, with a high near 102.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 101.
Monday Night
Clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sumner OK
 36.31°N 97.12°W
Last Update:
1:26 pm CDT Aug 27, 2026
Forecast Valid:
10pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation