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

Heavy Rainfall for Portions of the West and Central U.S.; Monitoring Fire Weather Conditions for New England

Tropical moisture continues to flow across portions of the Great Basin, desert Southwest and California. Isolated instances of flash flooding remains possible. Meanwhile, a storm and associated frontal boundary will focus showers and thunderstorms for the center of the nation. For New England, dry and breezy conditions could enhance favorable fire weather conditions. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Mostly Cloudy

80°F

27°C

Humidity 61%
Wind Speed SE 13 mph
Barometer 29.99 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 Sep 10:55 pm CDT
Extended Forecast for

Sherman TXSimilar City Names

  • Tonight

    Tonight: Partly cloudy, with a low around 71. South wind around 5 mph.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers between 10am and 4pm. Mostly sunny, with a high near 89. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 1am. Mostly clear, with a low around 74. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 92. South southwest wind around 10 mph. Chance of precipitation is 50%.

    High: 92 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers. Mostly sunny, with a high near 82. Northwest wind 5 to 10 mph.

    High: 82 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly clear, with a low around 63. North northwest wind 5 to 10 mph.

    Low: 63 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 71. South wind around 5 mph.
Sunday
A slight chance of showers between 10am and 4pm. Mostly sunny, with a high near 89. South wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 30 percent chance of showers, mainly after 1am. Mostly clear, with a low around 74. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 92. South southwest wind around 10 mph. Chance of precipitation is 50%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 82. Northwest wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 63. North northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 62.
Friday
Mostly sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sherman TXSimilar City Names
 33.62°N 96.6°W (Elev. 699 ft)
Last Update:
5:24 pm CDT Sep 20, 2025
Forecast Valid:
11pm CDT Sep 20, 2025-6pm CDT Sep 27, 2025
 
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