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

59°F

15°C

Humidity 59%
Wind Speed SE 12 mph
Barometer 30.12 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 8 Apr 7:50 am CDT
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: Sunny, with a high near 76. South wind 5 to 10 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 56. South southeast wind around 10 mph.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 79. South wind 10 to 15 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. South southeast wind around 10 mph.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. South wind around 10 mph.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. South southeast wind around 10 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 76. South wind 5 to 10 mph.
Tonight
Clear, with a low around 56. South southeast wind around 10 mph.
Thursday
Sunny, with a high near 79. South wind 10 to 15 mph.
Thursday Night
Partly cloudy, with a low around 61. South southeast wind around 10 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. South wind around 10 mph.
Friday Night
Partly cloudy, with a low around 61. South southeast wind around 10 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 25 mph.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
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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 8, 2026
Forecast Valid:
8am CDT Apr 8, 2026-6pm CDT Apr 14, 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