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

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Overcast

61°F

16°C

Humidity 68%
Wind Speed SW 6 mph
Barometer 30.28 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 23 Dec 10:55 pm EST
Extended Forecast for

Knoxville TN

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. Southwest wind around 5 mph.

    Low: 54 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 9am. Mostly cloudy, with a high near 66. Calm wind. Chance of precipitation is 20%.

    High: 66 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 57. Calm wind becoming southwest around 5 mph after midnight.

    Low: 57 °F

    Chance
    Showers

  • Christmas Day

    Christmas Day: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 69. Southwest wind 5 to 10 mph.

    High: 69 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 58. Southwest wind around 5 mph.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 54. Southwest wind around 5 mph.
Wednesday
A slight chance of showers between 7am and 9am. Mostly cloudy, with a high near 66. Calm wind. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 57. Calm wind becoming southwest around 5 mph after midnight.
Christmas Day
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 69. Southwest wind 5 to 10 mph.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 58. Southwest wind around 5 mph.
Friday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 72.
Saturday Night
Mostly cloudy, with a low around 60.
Sunday
Showers likely, mainly after 1pm. Cloudy, with a high near 67. Chance of precipitation is 60%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 50%.
Monday
A 10 percent chance of snow. Mostly sunny, with a high near 35.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Knoxville TN
 35.98°N 83.94°W (Elev. 942 ft)
Last Update:
6:06 pm EST Dec 23, 2025
Forecast Valid:
11pm EST Dec 23, 2025-6pm EST Dec 30, 2025
 
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