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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

63°F

17°C

Humidity 94%
Wind Speed S 9 mph
Barometer 30.23 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 24 Dec 6:50 am CST
Extended Forecast for

4 Miles SSW Grayson County Airport TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 78. South southwest wind 10 to 15 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 62. South southwest wind around 10 mph.

    Low: 62 °F

    Partly Cloudy

  • Christmas Day

    Christmas Day: Sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 82. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. South wind 5 to 10 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 56. South southwest wind around 10 mph.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 66. Southwest wind 10 to 20 mph becoming north in the afternoon. Winds could gust as high as 30 mph.

    High: 66 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 78. South southwest wind 10 to 15 mph.
Tonight
Partly cloudy, with a low around 62. South southwest wind around 10 mph.
Christmas Day
Sunny, with a high near 79. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 64. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 82. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 61. South wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 79. South southwest wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 56. South southwest wind around 10 mph.
Sunday
Mostly cloudy, with a high near 66. Southwest wind 10 to 20 mph becoming north in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 31.
Monday
Partly sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 27.
Tuesday
Sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Grayson County Airport TX
 33.69°N 96.68°W (Elev. 797 ft)
Last Update:
5:06 am CST Dec 24, 2025
Forecast Valid:
7am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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