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

70°F

21°C

Humidity 88%
Wind Speed S 12 mph
Barometer 29.90 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 10 Mar 6:50 am CDT
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 79. South wind around 15 mph, with gusts as high as 25 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 4am, then a chance of showers. Low around 62. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 62 °F

    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Cloudy through mid morning, then gradual clearing, with a high near 73. South wind 10 to 20 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 73 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41. North wind 15 to 20 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64. North wind 5 to 10 mph becoming south in the afternoon.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47. South wind 5 to 10 mph.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 75. South wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 53. South southeast wind 5 to 10 mph.

    Low: 53 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 79. South wind around 15 mph, with gusts as high as 25 mph.
Tonight
Showers and possibly a thunderstorm before 4am, then a chance of showers. Low around 62. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A 40 percent chance of showers. Cloudy through mid morning, then gradual clearing, with a high near 73. South wind 10 to 20 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 41. North wind 15 to 20 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 64. North wind 5 to 10 mph becoming south in the afternoon.
Thursday Night
Clear, with a low around 47. South wind 5 to 10 mph.
Friday
Sunny, with a high near 75. South wind 10 to 15 mph.
Friday Night
Clear, with a low around 53. South southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 80. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 56.
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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:
6:12 am CDT Mar 10, 2026
Forecast Valid:
7am CDT Mar 10, 2026-6pm CDT Mar 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