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

70°F

21°C

Humidity 88%
Wind Speed S 15 mph
Barometer 29.93 in
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 15 Apr 8:50 am CDT
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind 15 to 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 85. South southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 82. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers. Mostly cloudy, with a high near 65. North wind around 20 mph, with gusts as high as 30 mph.

    High: 65 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. North wind 5 to 15 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. Northeast wind 5 to 10 mph.

    High: 70 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind 15 to 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. South wind around 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 85. South southwest wind around 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 82. South wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 65. North wind around 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 43. North wind 5 to 15 mph.
Sunday
Sunny, with a high near 70. Northeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 49.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 69.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
7:57 am CDT Apr 15, 2026
Forecast Valid:
9am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation