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

Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Wednesday

In the Upper Midwest, heavy to excessive rain may bring flash and urban flooding through Wednesday. Scattered severe thunderstorms capable of large hail and damaging wind gusts are possible from the central High Plains into the Upper Midwest Wednesday. Extreme heat is ongoing over the Desert Southwest through Thursday. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

A Few Clouds

78°F

26°C

Humidity 83%
Wind Speed S 7 mph
Barometer 30.05 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 8 Jul 3:35 am CDT
Extended Forecast for

Sherman TX

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75. South wind around 5 mph.

    Low: 75 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 98. Heat index values as high as 103. South southwest wind around 5 mph. Chance of precipitation is 20%.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 98. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. South wind around 10 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. South southwest wind 5 to 10 mph.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South wind around 5 mph.

    Low: 76 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 75. South wind around 5 mph.
Wednesday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 98. Heat index values as high as 103. South southwest wind around 5 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 78. South wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 98. South southwest wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 79. South wind around 10 mph.
Saturday
Sunny, with a high near 96. South southwest wind 5 to 10 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South wind around 5 mph.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sherman TX
 33.64°N 96.6°W (Elev. 732 ft)
Last Update:
1:21 am CDT Jul 8, 2026
Forecast Valid:
3am CDT Jul 8, 2026-6pm CDT Jul 14, 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