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

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

75°F

24°C

Humidity 95%
Wind Speed NE 6 mph
Barometer 29.88 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 19 Jun 2:15 am CDT
Extended Forecast for

Denison TX

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 73. North northeast wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Showers and thunderstorms, mainly before 1pm. High near 83. North wind 5 to 10 mph becoming east southeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 83 °F

    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 72. East wind around 5 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. South wind 5 to 10 mph.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. South southeast wind around 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear
    then Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind around 10 mph.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. East wind around 5 mph becoming south southeast after midnight. Chance of precipitation is 70%.

    Low: 74 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 73. North northeast wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Showers and thunderstorms, mainly before 1pm. High near 83. North wind 5 to 10 mph becoming east southeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 72. East wind around 5 mph. Chance of precipitation is 30%.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. South wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 75. South southeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 93. South southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. South southwest wind around 10 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. East wind around 5 mph becoming south southeast after midnight. Chance of precipitation is 70%.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 87.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.75°N 96.55°W (Elev. 758 ft)
Last Update:
1:26 am CDT Jun 19, 2026
Forecast Valid:
2am CDT Jun 19, 2026-6pm CDT Jun 25, 2026
 
Forecast Discussion
 
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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