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.

Overcast

68°F

20°C

Humidity 91%
Wind Speed S 14 mph
Barometer 29.85 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 23 Apr 3:15 am CDT
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 77. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 77 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms, mainly between 1am and 4am. Increasing clouds, with a low around 69. South wind 15 to 20 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 7am. Cloudy through mid morning, then gradual clearing, with a high near 84. South southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 84 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 63. North northeast wind 5 to 10 mph.

    Low: 63 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 84. South southeast wind 10 to 15 mph.

    High: 84 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. South southeast wind 10 to 15 mph.

    Low: 67 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South wind around 15 mph, with gusts as high as 25 mph.

    High: 87 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 67. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 67 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 77. South wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms, mainly between 1am and 4am. Increasing clouds, with a low around 69. South wind 15 to 20 mph, with gusts as high as 25 mph.
Friday
A 20 percent chance of showers and thunderstorms after 7am. Cloudy through mid morning, then gradual clearing, with a high near 84. South southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 63. North northeast wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 84. South southeast wind 10 to 15 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. South southeast wind 10 to 15 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 67. South wind around 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 86.
Monday Night
Clear, with a low around 58.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 83.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
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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:
1:26 am CDT Apr 23, 2026
Forecast Valid:
3am CDT Apr 23, 2026-6pm CDT Apr 29, 2026
 
Forecast Discussion
 
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