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.

Light Rain Fog/Mist

46°F

8°C

Humidity 87%
Wind Speed NE 6 mph
Barometer 30.12 in
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill43°F (6°C)
Last update 7 Mar 3:50 pm CST
Extended Forecast for

Grayson County Airport TX

  • This Afternoon

    This Afternoon: Showers likely. Cloudy, with a steady temperature around 49. North wind around 10 mph. Chance of precipitation is 60%.

    High: 49 °F

    Showers
    Likely

  • Tonight

    Tonight: A 40 percent chance of showers before 9pm. Mostly cloudy, with a low around 44. North wind 5 to 10 mph.

    Low: 44 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 71. North wind around 5 mph becoming calm in the morning.

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 56. Light southeast wind becoming south southwest 5 to 10 mph in the evening. Chance of precipitation is 20%.

    Low: 56 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before noon. Mostly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 78 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 59. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 59 °F

    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly sunny, with a high near 72. South southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers likely. Cloudy, with a steady temperature around 49. North wind around 10 mph. Chance of precipitation is 60%.
Tonight
A 40 percent chance of showers before 9pm. Mostly cloudy, with a low around 44. North wind 5 to 10 mph.
Sunday
Sunny, with a high near 71. North wind around 5 mph becoming calm in the morning.
Sunday Night
A slight chance of showers between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 56. Light southeast wind becoming south southwest 5 to 10 mph in the evening. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms before noon. Mostly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 59. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers. Mostly sunny, with a high near 72. South southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 67.
Thursday Night
Clear, with a low around 50.
Friday
Sunny, with a high near 77.
Friday Night
Clear, with a low around 57.
Saturday
Sunny, with a high near 80.
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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:
5:20 pm CST Mar 7, 2026
Forecast Valid:
5pm CST Mar 7, 2026-6pm CDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation