News Headlines
- Looking Beyond the 7-Day Forecast? Check out our latest Extended Range Weather Pattern Discussion for North and Central Texas.
- New Drought Information Statement Available
- September is National Preparedness Month. Join us each week as we share important safety and preparedness information through our social media accounts. Check out our latest weather safety graphics here!
Current conditions at
Sherman/Denison, Grayson County Airport (KGYI)
Lat: 33.72°NLon: 96.67°WElev: 748ft.
Fair
93°F
34°C
| Humidity | 44% |
| Wind Speed | E 7 mph |
| Barometer | 29.94 in |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Heat Index | 97°F (36°C) |
| Last update | 21 Sep 2:50 pm CDT |
Extended Forecast for
Denison TX
This Afternoon
High: 93 °F
Slight Chance
T-stormsTonight
Low: 72 °F
Slight Chance
T-storms then
Mostly ClearTuesday
High: 92 °F
Mostly Sunny
Tuesday Night
Low: 72 °F
Partly Cloudy
Wednesday
High: 93 °F
Mostly Sunny
Wednesday Night
Low: 70 °F
Partly Cloudy
Thursday
High: 92 °F
Mostly Sunny
Thursday Night
Low: 69 °F
Partly Cloudy
Friday
High: 92 °F
Mostly Sunny
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Heat index values as high as 99. North northeast wind around 5 mph.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. North northeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 92. North northeast wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 72. Northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 93. East wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 70. East wind around 5 mph.
Thursday
Mostly sunny, with a high near 92. East southeast wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 69. East southeast wind around 5 mph.
Friday
Mostly sunny, with a high near 92. East southeast wind around 5 mph.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 96.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Denison TX
33.75°N 96.55°W (Elev. 758 ft)
33.75°N 96.55°W (Elev. 758 ft)
1:16 pm CDT Sep 21, 2026
3pm CDT Sep 21, 2026-6pm CDT Sep 27, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
