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Hazardous Weather Conditions
Current conditions at
Sherman/Denison, Grayson County Airport (KGYI)
Lat: 33.72°NLon: 96.67°WElev: 748ft.
Fair
99°F
37°C
| Humidity | 29% |
| Wind Speed | S 8 mph |
| Barometer | 30.13 in |
| Dewpoint | 61°F (16°C) |
| Visibility | 7.00 mi |
| Heat Index | 100°F (38°C) |
| Last update | 16 Sep 5:50 pm CDT |
Extended Forecast for
Denison TX
Heat Advisory September 16, 06:13pm until September 16, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
Tonight
Low: 78 °F
Mostly Clear
Thursday
High: 100 °F
Hot
Thursday Night
Low: 77 °F
Mostly Clear
Friday
High: 100 °F
Hot
Friday Night
Low: 76 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 76 °F
Clear
Sunday
High: 99 °F
Hot
Detailed Forecast
Tonight
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Thursday
Mostly sunny and hot, with a high near 100. Heat index values as high as 105. East southeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 77. South southeast wind around 5 mph.
Friday
Sunny and hot, with a high near 100. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 76. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 76. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Sunday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 75. South wind around 5 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 94. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 70.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Denison TX
33.78°N 96.57°W (Elev. 659 ft)
33.78°N 96.57°W (Elev. 659 ft)
6:06 pm CDT Sep 16, 2026
6pm CDT Sep 16, 2026-6pm CDT Sep 23, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
