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

41°F

5°C

Humidity 53%
Wind Speed NE 17 mph
Barometer 30.39 in
Dewpoint 25°F (-4°C)
Visibility 9.00 mi
Wind Chill33°F (1°C)
Last update 19 Jan 9:50 am CST
Extended Forecast for

Grayson County Airport TX

  • M.L.King Day

    M.L.King Day: Mostly cloudy, with a high near 44. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 44 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 24. North northeast wind 5 to 10 mph becoming light east northeast after midnight.

    Low: 24 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 52 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers after midnight. Increasing clouds, with a low around 42. South wind around 10 mph.

    Low: 42 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers before noon. Mostly cloudy, with a high near 56. South wind around 5 mph becoming east southeast in the afternoon.

    High: 56 °F

    Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 39. East wind around 5 mph becoming north northeast after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. Southeast wind around 10 mph.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of rain. Cloudy, with a high near 49. East southeast wind 10 to 15 mph becoming north northeast in the afternoon.

    High: 49 °F

    Chance Rain

Detailed Forecast

M.L.King Day
Mostly cloudy, with a high near 44. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 24. North northeast wind 5 to 10 mph becoming light east northeast after midnight.
Tuesday
Sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the morning.
Tuesday Night
A 40 percent chance of showers after midnight. Increasing clouds, with a low around 42. South wind around 10 mph.
Wednesday
A 30 percent chance of showers before noon. Mostly cloudy, with a high near 56. South wind around 5 mph becoming east southeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 39. East wind around 5 mph becoming north northeast after midnight.
Thursday
Partly sunny, with a high near 56. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 40. Southeast wind around 10 mph.
Friday
A 40 percent chance of rain. Cloudy, with a high near 49. East southeast wind 10 to 15 mph becoming north northeast in the afternoon.
Friday Night
A chance of rain before midnight, then a chance of rain, snow, and freezing rain. Cloudy, with a low around 22. Chance of precipitation is 40%.
Saturday
A chance of snow and freezing rain. Cloudy, with a high near 31. Chance of precipitation is 40%.
Saturday Night
A slight chance of freezing rain. Mostly cloudy, with a low around 17. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 34.
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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:
9:02 am CST Jan 19, 2026
Forecast Valid:
10am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation