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

75°F

24°C

Humidity 29%
Wind Speed S 10 mph
Barometer 30.06 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 8 Feb 3:50 pm CST
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 48. South wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 79. Calm wind becoming south around 5 mph in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 58. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 50. South southwest wind around 10 mph becoming north after midnight.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. North wind 5 to 10 mph.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. Northeast wind around 5 mph becoming east southeast after midnight.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. East southeast wind 5 to 10 mph becoming south southwest in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 51. South wind around 10 mph becoming east northeast after midnight.

    Low: 51 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 48. South wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 79. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 58. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50. South southwest wind around 10 mph becoming north after midnight.
Wednesday
Mostly sunny, with a high near 67. North wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 48. Northeast wind around 5 mph becoming east southeast after midnight.
Thursday
Mostly sunny, with a high near 74. East southeast wind 5 to 10 mph becoming south southwest in the afternoon.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 51. South wind around 10 mph becoming east northeast after midnight.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 70.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 60.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 42.
Sunday
Sunny, with a high near 66.
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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:
11:22 am CST Feb 8, 2026
Forecast Valid:
4pm CST Feb 8, 2026-6pm CST Feb 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation