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

79°F

26°C

Humidity 51%
Wind Speed S 12 mph
Barometer 29.96 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 1 Mar 2:50 pm CST
Extended Forecast for

Grayson County Airport TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. South wind around 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 9pm and 3am. Partly cloudy, with a low around 55. South wind around 10 mph.

    Low: 55 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 69. South southeast wind around 10 mph becoming north northeast in the morning.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 80. South wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 80 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 63. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 78. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 78 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 62. South wind around 10 mph. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. South wind around 15 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 9pm and 3am. Partly cloudy, with a low around 55. South wind around 10 mph.
Monday
Mostly sunny, with a high near 69. South southeast wind around 10 mph becoming north northeast in the morning.
Monday Night
Partly cloudy, with a low around 59. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 80. South wind 15 to 20 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 63. South wind around 15 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 78. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 62. South wind around 10 mph. Chance of precipitation is 80%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Friday Night
Showers and possibly a thunderstorm. Low around 55. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 70. Chance of precipitation is 70%.
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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:
12:27 pm CST Mar 1, 2026
Forecast Valid:
3pm CST Mar 1, 2026-6pm CST Mar 7, 2026
 
Forecast Discussion
 
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Additional Resources

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