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.

Overcast

77°F

25°C

Humidity 94%
Wind Speed S 17 mph
Barometer 29.87 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 5 Mar 3:50 pm CST
Extended Forecast for

Grayson County Airport TX

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 78. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 54. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Mostly cloudy, with a high near 65. West wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 47. North wind around 10 mph.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 69. North wind 5 to 10 mph becoming southeast in the afternoon.

    High: 69 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 57. South wind around 5 mph.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South southwest wind 5 to 10 mph.

    High: 77 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 78. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 54. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Mostly cloudy, with a high near 65. West wind 10 to 15 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47. North wind around 10 mph.
Sunday
Partly sunny, with a high near 69. North wind 5 to 10 mph becoming southeast in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 57. South wind around 5 mph.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South southwest wind 5 to 10 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Thursday
Sunny, with a high near 68.
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 Mar 5, 2026
Forecast Valid:
6pm CST Mar 5, 2026-6pm CDT Mar 12, 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