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

72°F

22°C

Humidity 47%
Wind Speed Calm
Barometer 29.64 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 25 Feb 5:50 pm CST
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Northeast wind 5 to 10 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 75. North northeast wind 10 to 15 mph.

    High: 75 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. North northeast wind 5 to 10 mph.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76. Southeast wind around 5 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. Southeast wind 5 to 10 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. South wind 10 to 15 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers, with thunderstorms also possible after midnight. Partly cloudy, with a low around 58. South southeast wind around 10 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers. Mostly 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

  • Sunday Night

    Sunday Night: A 30 percent chance of showers. Partly cloudy, with a low around 53. South southeast wind 10 to 15 mph.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 51. Northeast wind 5 to 10 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 75. North northeast wind 10 to 15 mph.
Thursday Night
Mostly clear, with a low around 47. North northeast wind 5 to 10 mph.
Friday
Sunny, with a high near 76. Southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 52. Southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 81. South wind 10 to 15 mph.
Saturday Night
A slight chance of showers, with thunderstorms also possible after midnight. Partly cloudy, with a low around 58. South southeast wind around 10 mph. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 53. South southeast wind 10 to 15 mph.
Monday
A 20 percent chance of showers. Mostly cloudy, with a high near 68.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 69.
Tuesday Night
A 50 percent chance of showers. Cloudy, with a low around 51.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
5:06 pm CST Feb 25, 2026
Forecast Valid:
5pm CST Feb 25, 2026-6pm CST Mar 4, 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