Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72° N Lon: 96.67° W Elev: 748 ft.

Fair and Breezy

54°F

12°C

Humidity 54%
Wind Speed N 21 G 24 mph
Barometer 30.11 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 14 Jan 8:45 am CST
Detailed forecast for

Grayson County

Today
Sunny. Highs in the mid 50s. North winds 10 to 20 mph, becoming 15 to 20 mph this afternoon. Gusts up to 30 mph.
Tonight
Mostly clear. Much cooler with lows in the upper 20s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight.
Thursday
Sunny. Highs in the mid 50s. West winds around 5 mph, becoming southwest in the afternoon.
Thursday Night
Mostly clear. Not as cool with lows around 40. Southwest winds 5 to 10 mph.
Friday
Sunny. Highs in the upper 50s. North winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon.
Friday Night
Mostly clear. Lows in the lower 30s.
Saturday
Mostly sunny. Highs in the lower 50s.
Saturday Night
Mostly clear. Lows in the mid 20s.
Sunday
Sunny. Highs in the lower 50s.
Sunday Night
Mostly clear. Lows in the lower 30s.
Martin Luther King Jr Day
Sunny. Highs in the mid 50s.
Monday Night
Partly cloudy. Lows in the upper 20s.
Tuesday
Mostly sunny. Highs in the lower 50s.



Basemap Options
Click map to change the forecast location
Loading map...
514 AM CST Wed Jan 14 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database