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.

Fog

66°F

19°C

Humidity 100%
Wind Speed NE 5 mph
Barometer 30.05 in
Dewpoint 66°F (19°C)
Visibility 0.25 mi
Last update 24 May 7:50 am CDT
Extended Forecast for

Denison TX

  • Today

    Today: Patchy fog before 10am. Otherwise, sunny, with a high near 83. Northeast wind around 5 mph.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 84. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 84. East southeast wind around 5 mph becoming south in the afternoon. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. East southeast wind around 5 mph. Chance of precipitation is 50%.

    Low: 68 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 80. South southeast wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 80 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southeast wind around 5 mph. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southeast wind around 5 mph becoming north northwest in the afternoon.

    High: 83 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, sunny, with a high near 83. Northeast wind around 5 mph.
Tonight
Mostly clear, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.
Memorial Day
Sunny, with a high near 84. Calm wind becoming east northeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 84. East southeast wind around 5 mph becoming south in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. East southeast wind around 5 mph. Chance of precipitation is 50%.
Wednesday
Showers and possibly a thunderstorm. High near 80. South southeast wind 5 to 10 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southeast wind around 5 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southeast wind around 5 mph becoming north northwest in the afternoon.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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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:
6:12 am CDT May 24, 2026
Forecast Valid:
9am CDT May 24, 2026-6pm CDT May 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation