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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
85°F
29°C
| Humidity | 50% |
| Wind Speed | SE 10 mph |
| Barometer | 29.83 in |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Heat Index | 86°F (30°C) |
| Last update | 29 Sep 9:35 pm CDT |
Extended Forecast for
Denison TX
Flood Watch September 30, 04:00pm until October 2, 07:00am
Tonight
Low: 76 °F
Increasing
CloudsWednesday
High: 93 °F
Mostly Cloudy
then Chance
T-stormsWednesday Night
Low: 72 °F
Chance
T-storms then
Showers
LikelyThursday
High: 74 °F
Heavy Rain
Thursday Night
Low: 69 °F
Showers
Friday
High: 79 °F
Showers
LikelyFriday Night
Low: 66 °F
Chance
T-storms then
Showers
LikelySaturday
High: 78 °F
Showers
LikelySaturday Night
Low: 65 °F
Chance
Showers
Detailed Forecast
Tonight
Increasing clouds, with a low around 76. South wind around 10 mph.
Wednesday
A slight chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 93. Heat index values as high as 98. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, then becoming cloudy toward daybreak, with a low around 72. South southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 74. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
Showers and possibly a thunderstorm. Low around 69. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 79. East wind 5 to 10 mph becoming north northeast in the afternoon. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. North northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. North northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind around 5 mph. Chance of precipitation is 30%.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 79.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 79.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Denison TX
33.75°N 96.57°W (Elev. 748 ft)
33.75°N 96.57°W (Elev. 748 ft)
9:41 pm CDT Sep 29, 2026
9pm CDT Sep 29, 2026-6pm CDT Oct 6, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
