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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Overcast

69°F

21°C

Humidity 97%
Wind Speed NE 8 mph
Barometer 30.14 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 3 Oct 11:15 pm CDT
Extended Forecast for

Collinsville TX

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 64. North northeast wind around 5 mph.

    Low: 64 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 82. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62. North wind around 5 mph.

    Low: 62 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 83. Northeast wind around 5 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 57. Calm wind.

    Low: 57 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Calm wind.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 57. Calm wind.

    Low: 57 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 64. North northeast wind around 5 mph.
Sunday
A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 82. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 62. North wind around 5 mph.
Monday
Sunny, with a high near 83. Northeast wind around 5 mph.
Monday Night
Clear, with a low around 57. Calm wind.
Tuesday
Sunny, with a high near 83. Calm wind.
Tuesday Night
Clear, with a low around 57. Calm wind.
Wednesday
Sunny, with a high near 83. Calm wind.
Wednesday Night
Clear, with a low around 58. Calm wind.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 64.
Saturday
A 20 percent chance of showers. Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville TX
 33.57°N 96.9°W (Elev. 722 ft)
Last Update:
6:06 pm CDT Oct 3, 2026
Forecast Valid:
11pm CDT Oct 3, 2026-6pm CDT Oct 10, 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