Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

80°F

27°C

Humidity 75%
Wind Speed SE 9 mph
Barometer 29.95 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 12 Oct 9:55 pm CDT
Extended Forecast for

Denison TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 97. South wind around 10 mph, with gusts as high as 20 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South wind around 10 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 91. Heat index values as high as 98. South southwest wind around 10 mph.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 71. South southeast wind 5 to 10 mph.

    Low: 71 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 88. South southwest wind 5 to 10 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. East southeast wind 5 to 10 mph becoming north 10 to 15 mph after midnight.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72. North wind around 20 mph, with gusts as high as 30 mph.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. North wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 75. South wind 5 to 10 mph.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 97. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 76. South wind around 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 98. South southwest wind around 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71. South southeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 88. South southwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 64. East southeast wind 5 to 10 mph becoming north 10 to 15 mph after midnight.
Friday
Partly sunny, with a high near 72. North wind around 20 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 53. North wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Denison TX
 33.73°N 96.57°W (Elev. 699 ft)
6:06 pm CDT Oct 12, 2026
10pm CDT Oct 12, 2026-6pm CDT Oct 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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