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

Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

29°F

-2°C

Humidity 59%
Wind Speed Calm
Barometer 30.54 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 30 Dec 2:35 am CST
Extended Forecast for

Grayson County Airport TX

  • Overnight

    Overnight: Clear, with a low around 23. North northwest wind around 5 mph.

    Low: 23 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 51. Wind chill values between 16 and 26 early. Northwest wind around 5 mph becoming southwest in the afternoon.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 34. Southwest wind 5 to 10 mph.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 61. West wind around 5 mph.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. South southwest wind around 5 mph.

    Low: 40 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 66. South southwest wind 5 to 10 mph.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. South southeast wind around 10 mph.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 66. Southwest wind around 10 mph becoming northwest in the afternoon.

    High: 66 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 41. North wind around 5 mph.

    Low: 41 °F

    Clear

Detailed Forecast

Overnight
Clear, with a low around 23. North northwest wind around 5 mph.
Tuesday
Sunny, with a high near 51. Wind chill values between 16 and 26 early. Northwest wind around 5 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 34. Southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 61. West wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 40. South southwest wind around 5 mph.
New Year's Day
Partly sunny, with a high near 66. South southwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 49. South southeast wind around 10 mph.
Friday
Sunny, with a high near 66. Southwest wind around 10 mph becoming northwest in the afternoon.
Friday Night
Clear, with a low around 41. North wind around 5 mph.
Saturday
Sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 47.
Monday
Mostly sunny, with a high near 66.
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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:
11:21 pm CST Dec 29, 2025
Forecast Valid:
3am CST Dec 30, 2025-6pm CST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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