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

54°F

12°C

Humidity 56%
Wind Speed SE 7 mph
Barometer 30.28 in
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Wind Chill52°F (11°C)
Last update 20 Apr 2:55 am CDT
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 51. South southeast wind around 5 mph.

    Low: 51 °F

    Partly Cloudy

  • Monday

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

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 53. South wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Mostly cloudy, with a high near 65. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 65 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 57. South southeast wind around 10 mph. Chance of precipitation is 20%.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. South southeast wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64. South southeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 78. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 78 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly 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 steady temperature around 51. South southeast wind around 5 mph.
Monday
Partly sunny, with a high near 73. South wind 5 to 10 mph.
Monday Night
A slight chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 53. South wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Mostly cloudy, with a high near 65. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Tuesday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 57. South southeast wind around 10 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. South southeast wind 10 to 15 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 64. South southeast wind around 15 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 78. South wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 25 mph.
Friday
Partly sunny, with a high near 82.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
1:26 am CDT Apr 20, 2026
Forecast Valid:
3am CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation