National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

26°C

79°F

Humidity 84%
Wind Speed W 11 km/h
Barometer 30.06 in
Dewpoint 23°C (73°F)
Visibility 16 km
Heat Index28°C (83°F)
Last update 13 Jul 9:50 am CDT
Extended Forecast for

Denison TX

Flood Watch July 13, 10:01am until July 13, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 13, 10:01am until July 13, 07:00pm

    NOW until 7:00pm Sun

    Flood Watch

  • Today

    High: 29 °C

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 32. Heat index values as high as 37. Southwest wind 5 to 10 km/h.

    High: 32 °C

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23. South wind 5 to 10 km/h.

    Low: 23 °C

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 33. South wind 10 to 15 km/h.

    High: 33 °C

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. South wind around 10 km/h.

    Low: 24 °C

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34. South wind 10 to 15 km/h.

    High: 34 °C

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 24. South wind around 10 km/h.

    Low: 24 °C

    Partly Cloudy

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 29. Southwest wind around 10 km/h. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 22. Calm wind.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 32. Heat index values as high as 37. Southwest wind 5 to 10 km/h.
Monday Night
Partly cloudy, with a low around 23. South wind 5 to 10 km/h.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 33. South wind 10 to 15 km/h.
Tuesday Night
Partly cloudy, with a low around 24. South wind around 10 km/h.
Wednesday
Mostly sunny, with a high near 34. South wind 10 to 15 km/h.
Wednesday Night
Partly cloudy, with a low around 24. South wind around 10 km/h.
Thursday
Mostly sunny, with a high near 34. South southwest wind around 10 km/h.
Thursday Night
Partly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 35.
Friday Night
Mostly clear, with a low around 24.
Saturday
Mostly sunny, with a high near 36.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.75°N 96.55°W (Elev. 758 m)
Last Update:
5:24 am CDT Jul 13, 2025
Forecast Valid:
10am CDT Jul 13, 2025-6pm CDT Jul 19, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation