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.

Fair

65°F

18°C

Humidity 32%
Wind Speed SE 8 mph
Barometer 30.01 in
Dewpoint 35°F (2°C)
Visibility 9.00 mi
Last update 27 Feb 9:35 pm CST
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: A 10 percent chance of showers after midnight. Partly cloudy, with a low around 55. South southeast wind 5 to 10 mph.

    Low: 55 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A 10 percent chance of showers before 9am. Sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Increasing clouds, with a low around 57. South southeast wind around 10 mph.

    Low: 57 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before midnight, then a slight chance of showers and thunderstorms between midnight and 3am, then a slight chance of showers after 3am. Partly cloudy, with a low around 57. South southeast wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 80. South wind around 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 60. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 60 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
A 10 percent chance of showers after midnight. Partly cloudy, with a low around 55. South southeast wind 5 to 10 mph.
Saturday
A 10 percent chance of showers before 9am. Sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 20 percent chance of showers after midnight. Increasing clouds, with a low around 57. South southeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
A slight chance of showers before midnight, then a slight chance of showers and thunderstorms between midnight and 3am, then a slight chance of showers after 3am. Partly cloudy, with a low around 57. South southeast wind 10 to 15 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 59. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 80. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
A slight chance of showers, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 60. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Thursday
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 76. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
5:12 pm CST Feb 27, 2026
Forecast Valid:
9pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
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Additional Resources

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Chance of Precipitation