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.

Mostly Cloudy

77°F

25°C

Humidity 68%
Wind Speed S 14 mph
Barometer 29.75 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Apr 7:35 pm CDT
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 52. South wind 15 to 20 mph becoming north after midnight. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Slight Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. North wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. South southeast wind around 5 mph.

    Low: 48 °F

    Mostly Clear

  • Monday

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

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 54. South wind around 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 72. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 60. South wind around 10 mph.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 52. South wind 15 to 20 mph becoming north after midnight. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. North wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly clear, with a low around 44. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 72. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, 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
Mostly cloudy, with a low around 54. South wind around 5 mph.
Tuesday
Partly sunny, with a high near 72. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 60. South wind around 10 mph.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 65.
Thursday
Mostly cloudy, with a high near 83.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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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 pm CDT Apr 17, 2026
Forecast Valid:
7pm CDT Apr 17, 2026-6pm CDT Apr 24, 2026
 
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Additional Resources

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Chance of Precipitation