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

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Mostly Cloudy

80°F

27°C

Humidity 71%
Wind Speed S 13 mph
Barometer 29.79 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 May 10:15 pm CDT
Extended Forecast for

4 Miles SSE Willis OK

  • Tonight

    Tonight: Mostly cloudy, with a low around 74. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 73. South southeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 81. South wind 10 to 15 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Northeast wind 5 to 10 mph.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East northeast wind 5 to 10 mph.

    Low: 64 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 75. Southeast wind around 5 mph. Chance of precipitation is 60%.

    High: 75 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming south southwest after midnight. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 74. South wind around 15 mph, with gusts as high as 20 mph.
Monday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 73. South southeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
Showers and possibly a thunderstorm. High near 81. South wind 10 to 15 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. North northeast wind 5 to 10 mph. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Northeast wind 5 to 10 mph.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East northeast wind 5 to 10 mph.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 75. Southeast wind around 5 mph. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming south southwest after midnight. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Willis OK
 33.82°N 96.79°W (Elev. 646 ft)
Last Update:
7:46 pm CDT May 17, 2026
Forecast Valid:
10pm CDT May 17, 2026-6pm CDT May 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation