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.

Mostly Cloudy

66°F

19°C

Humidity 93%
Wind Speed S 18 mph
Barometer 29.93 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 5 Mar 4:55 am CST
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Cloudy, then gradually becoming mostly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 63. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 76. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56. South wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a steady temperature around 58. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. North wind around 10 mph. Chance of precipitation is 40%.

    Low: 46 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 67. North wind 5 to 10 mph becoming east in the afternoon.

    High: 67 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 56. East southeast wind around 5 mph becoming south after midnight.

    Low: 56 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60. South wind around 5 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Cloudy, then gradually becoming mostly sunny, with a high near 76. South wind 10 to 15 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 63. South wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 76. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56. South wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a steady temperature around 58. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. North wind around 10 mph. Chance of precipitation is 40%.
Sunday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 67. North wind 5 to 10 mph becoming east in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 56. East southeast wind around 5 mph becoming south after midnight.
Monday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 75. Chance of precipitation is 50%.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Tuesday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.66°W (Elev. 797 ft)
Last Update:
12:27 am CST Mar 5, 2026
Forecast Valid:
5am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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