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

50°F

10°C

Humidity 76%
Wind Speed Calm
Barometer 30.39 in
Dewpoint 43°F (6°C)
Visibility 9.00 mi
Last update 19 Apr 8:50 am CDT
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: Sunny, with a high near 71. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 48. South southeast wind around 5 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. South wind 5 to 10 mph.

    High: 73 °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 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 68. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 68 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. South southeast wind around 10 mph.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 75. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 75 °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 25 mph.

    Low: 65 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 80. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 80 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 71. Calm wind becoming east southeast around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 48. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 73. 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 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 68. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 58. South southeast wind around 10 mph.
Wednesday
Mostly cloudy, with a high near 75. 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 25 mph.
Thursday
Mostly cloudy, with a high near 80. South wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 55.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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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:
6:06 am CDT Apr 19, 2026
Forecast Valid:
10am CDT Apr 19, 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