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

48°F

9°C

Humidity 71%
Wind Speed NE 6 mph
Barometer 30.33 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 18 Apr 11:35 pm CDT
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 43. North northeast wind 5 to 10 mph becoming light east after midnight.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49. South southeast wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 74. South wind 5 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 54. South wind 5 to 10 mph.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 69. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 59. South southeast wind around 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 43. North northeast wind 5 to 10 mph becoming light east after midnight.
Sunday
Sunny, with a high near 72. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 49. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 74. South wind 5 to 10 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 54. South wind 5 to 10 mph.
Tuesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 69. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 59. South southeast wind around 10 mph.
Wednesday
Mostly cloudy, with a high near 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 81.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 77.
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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:
6:12 pm CDT Apr 18, 2026
Forecast Valid:
11pm CDT Apr 18, 2026-6pm CDT Apr 25, 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