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

67°F

19°C

Humidity 67%
Wind Speed S 13 mph
Barometer 30.12 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 10 Apr 12:55 am CDT
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: Partly cloudy, with a low around 62. South southeast wind around 10 mph.

    Low: 62 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. South wind around 10 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. South southeast wind around 10 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 76. South wind 15 to 20 mph. Chance of precipitation is 90%.

    High: 76 °F

    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 82. South wind around 15 mph, with gusts as high as 25 mph.

    High: 82 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 62. South southeast wind around 10 mph.
Friday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 80. South wind around 10 mph.
Friday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. South southeast wind around 10 mph.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday
Showers and possibly a thunderstorm. High near 76. South wind 15 to 20 mph. Chance of precipitation is 90%.
Sunday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly cloudy, with a high near 82. South wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 25 mph.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 81.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 60.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
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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 9, 2026
Forecast Valid:
1am CDT Apr 10, 2026-6pm CDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation