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Hazardous Weather Conditions
Current conditions at
Sherman/Denison, Grayson County Airport (KGYI)
Lat: 33.72°NLon: 96.67°WElev: 748ft.
A Few Clouds
97°F
36°C
| Humidity | 37% |
| Wind Speed | SE 9 mph |
| Barometer | 30.19 in |
| Dewpoint | 66°F (19°C) |
| Visibility | 8.00 mi |
| Heat Index | 101°F (38°C) |
| Last update | 16 Sep 12:50 pm CDT |
Extended Forecast for
3 Miles NE Knollwood TX
Heat Advisory September 16, 01:23pm until September 16, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
This Afternoon
High: 100 °F
Hot
Tonight
Low: 78 °F
Mostly Clear
Thursday
High: 99 °F
Hot
Thursday Night
Low: 77 °F
Mostly Clear
Friday
High: 99 °F
Hot
Friday Night
Low: 76 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 76 °F
Clear
Detailed Forecast
This Afternoon
Sunny and hot, with a high near 100. South southeast wind around 5 mph.
Tonight
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Thursday
Mostly sunny and hot, with a high near 99. Heat index values as high as 104. Southeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph.
Friday
Sunny and hot, with a high near 99. 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.
Saturday Night
Clear, with a low around 76. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 99. South southwest wind around 10 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles NE Knollwood TX
33.71°N 96.57°W (Elev. 673 ft)
33.71°N 96.57°W (Elev. 673 ft)
1:02 pm CDT Sep 16, 2026
1pm CDT Sep 16, 2026-6pm CDT Sep 22, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
