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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

62°F

17°C

Humidity 96%
Wind Speed S 9 mph
Barometer 30.21 in
Dewpoint 61°F (16°C)
Visibility 8.00 mi
Last update 24 Dec 4:15 am CST
Extended Forecast for

Grayson County Airport TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 79. South southwest wind 10 to 15 mph.

    High: 79 °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 80. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °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 83. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62. South southwest wind 5 to 10 mph.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 80 °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 67. Southwest wind 10 to 20 mph becoming north in the afternoon. Winds could gust as high as 30 mph.

    High: 67 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 79. 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 80. 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 83. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 62. South southwest wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 80. 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 67. 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 44.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Sunny, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayson County Airport TX
 33.71°N 96.68°W (Elev. 751 ft)
Last Update:
11:21 pm CST Dec 23, 2025
Forecast Valid:
4am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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