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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
88°F
31°C
| Humidity | 49% |
| Wind Speed | S 7 mph |
| Barometer | 29.91 in |
| Dewpoint | 67°F (19°C) |
| Visibility | 9.00 mi |
| Heat Index | 91°F (33°C) |
| Last update | 6 Sep 10:15 pm CDT |
Extended Forecast for
Denison TX
Heat Advisory September 6, 11:31pm until September 7, 08:00pm
NOW until 8:00pm Mon
Heat Advisory
Tonight
Low: 79 °F
Mostly Clear
Labor Day
High: 101 °F
Hot
Monday Night
Low: 79 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 79 °F
Mostly Clear
Wednesday
High: 100 °F
Hot
Wednesday Night
Low: 79 °F
Clear
Thursday
High: 98 °F
Slight Chance
Showers then
Slight Chance
T-storms
Detailed Forecast
Tonight
Mostly clear, with a low around 79. South wind around 5 mph becoming calm.
Labor Day
Sunny and hot, with a high near 101. Heat index values as high as 106. Light south wind becoming southeast 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 79. South southeast wind around 5 mph.
Tuesday
Sunny and hot, with a high near 101. Heat index values as high as 104. Light southeast wind becoming south southeast 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 79. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 100. South wind around 5 mph.
Wednesday Night
Clear, with a low around 79. South southeast wind around 5 mph.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Sunny, with a high near 98. South southwest wind around 5 mph becoming east in the afternoon. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 78. Southeast wind around 5 mph.
Friday
Mostly sunny and hot, with a high near 99.
Friday Night
Mostly clear, with a low around 78.
Saturday
Sunny and hot, with a high near 99.
Saturday Night
Mostly clear, with a low around 77.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Additional Forecasts and Information
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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)
6:11 pm CDT Sep 6, 2026
11pm CDT Sep 6, 2026-6pm CDT Sep 13, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
