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

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

65°F

18°C

Humidity 76%
Wind Speed SW 12 mph
Barometer 30.09 in (1018.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Dec 12:53 pm EST
Extended Forecast for

Maryville TN

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 70. Southwest wind 5 to 10 mph.

    High: 70 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Southwest wind around 5 mph.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 58. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 73. Calm wind becoming west around 5 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. Calm wind becoming south around 5 mph.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 72. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 47. Breezy. Chance of precipitation is 70%.

    Low: 47 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Monday

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

Detailed Forecast

Christmas Day
Mostly cloudy, with a high near 70. Southwest wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 58. Southwest wind around 5 mph.
Friday
Mostly cloudy, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 58. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 73. Calm wind becoming west around 5 mph.
Saturday Night
Partly cloudy, with a low around 55. Calm wind becoming south around 5 mph.
Sunday
Mostly cloudy, with a high near 72. South wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 47. Breezy. Chance of precipitation is 70%.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Mostly clear, with a low around 22.
Wednesday
Sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville TN
 35.76°N 83.96°W (Elev. 994 ft)
Last Update:
12:31 pm EST Dec 25, 2025
Forecast Valid:
1pm EST Dec 25, 2025-6pm EST Dec 31, 2025
 
Forecast Discussion
 
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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