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.

Overcast

75°F

24°C

Humidity 78%
Wind Speed S 10 mph
Barometer 29.88 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 15 Apr 6:50 pm CDT
Extended Forecast for

Collinsville TX

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Mostly cloudy, with a low around 65. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 84. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66. South wind around 10 mph.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 80. South wind 10 to 20 mph, with gusts as high as 25 mph.

    High: 80 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 64. North wind around 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 70. East wind 5 to 10 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49. Southeast wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Mostly cloudy, with a low around 65. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 84. South southwest wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 66. South wind around 10 mph.
Friday
Partly sunny, with a high near 80. South wind 10 to 20 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 64. North wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 44. North wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 70. East wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 49. Southeast wind around 5 mph.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 65.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 69.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 58.
Wednesday
Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Collinsville TX
 33.57°N 96.9°W (Elev. 722 ft)
Last Update:
6:06 pm CDT Apr 15, 2026
Forecast Valid:
7pm CDT Apr 15, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation