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.

Mostly Cloudy

68°F

20°C

Humidity 98%
Wind Speed NE 3 mph
Barometer 29.92 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 21 May 8:55 pm CDT
Extended Forecast for

Sherman TX

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 1am. Patchy fog after 3am. Otherwise, cloudy, with a low around 66. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 80. Calm wind becoming southwest around 5 mph.

    High: 80 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. East southeast wind around 5 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 80 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Memorial Day

    Memorial Day: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 80. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 80 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 1am. Patchy fog after 3am. Otherwise, cloudy, with a low around 66. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 80. Calm wind becoming southwest around 5 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. East southeast wind around 5 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Calm wind becoming northeast around 5 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.
Memorial Day
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 80. Calm wind becoming east northeast around 5 mph in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 64. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sherman TX
 33.62°N 96.63°W (Elev. 748 ft)
Last Update:
6:12 pm CDT May 21, 2026
Forecast Valid:
9pm CDT May 21, 2026-6pm CDT May 28, 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