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.

A Few Clouds

68°F

20°C

Humidity 43%
Wind Speed SE 9 mph
Barometer 30.00 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 28 Feb 10:35 pm CST
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Increasing clouds, with a low around 58. Southeast wind around 10 mph.

    Low: 58 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers. Partly cloudy, with a low around 57. South southeast wind 10 to 15 mph.

    Low: 57 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 61. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 82. South wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 82 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 62. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind around 10 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 20 percent chance of showers after 3am. Increasing clouds, with a low around 58. Southeast wind around 10 mph.
Sunday
A 20 percent chance of showers before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 57. South southeast wind 10 to 15 mph.
Monday
Mostly sunny, with a high near 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 61. South southeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday
Partly sunny, with a high near 82. South wind 15 to 20 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 62. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind around 10 mph. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
5:13 pm CST Feb 28, 2026
Forecast Valid:
10pm CST Feb 28, 2026-6pm CST Mar 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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