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 and Breezy

73°F

23°C

Humidity 81%
Wind Speed S 21 G 25 mph
Barometer 29.75 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 18 Apr 1:35 am CDT
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Low around 52. South wind around 20 mph becoming north. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. North wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. North wind 10 to 15 mph becoming east 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. South southeast wind around 5 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 53. South wind 5 to 10 mph.

    Low: 53 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 70. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 70 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 60. South wind around 10 mph.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 52. South wind around 20 mph becoming north. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. North wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly clear, with a low around 43. North wind 10 to 15 mph becoming east 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 72. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 48. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 73. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 53. South wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 70. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 60. South wind around 10 mph.
Wednesday
Partly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly cloudy, with a high near 81.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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:
1:26 am CDT Apr 18, 2026
Forecast Valid:
1am CDT Apr 18, 2026-6pm CDT Apr 24, 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