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.

Fair

63°F

17°C

Humidity 52%
Wind Speed S 13 mph
Barometer 30.32 in
Dewpoint 45°F (7°C)
Visibility 9.00 mi
Last update 20 Apr 9:47 am CDT
Extended Forecast for

Collinsville TX

  • Today

    Today: Partly sunny, with a high near 71. South wind 5 to 10 mph.

    High: 71 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 53. South wind around 5 mph. Chance of precipitation is 40%.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Cloudy, with a high near 63. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 56. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 77. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 77 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 83. South wind around 15 mph, with gusts as high as 20 mph.

    High: 83 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 71. South wind 5 to 10 mph.
Tonight
A slight chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 53. South wind around 5 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Cloudy, with a high near 63. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A slight chance of thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 56. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 64. South southeast wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 77. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 83. South wind around 15 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Saturday
Partly sunny, with a high near 81.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Collinsville TX
 33.57°N 96.9°W (Elev. 722 ft)
Last Update:
6:06 am CDT Apr 20, 2026
Forecast Valid:
10am CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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