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

Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Athens McMinn County Airport (KMMI)

Lat: 35.4°NLon: 84.56°WElev: 874ft.

Fair

25°F

-4°C

Humidity 100%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 9 Dec 5:35 am EST
Extended Forecast for

Decatur TN

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 47. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 47 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 34. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 56 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. West wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 46. Calm wind becoming west around 5 mph in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 54. Calm wind becoming south around 5 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 47. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Partly cloudy, with a low around 34. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 56. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 28. West wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.
Thursday
Mostly sunny, with a high near 46. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 29. Calm wind.
Friday
Mostly sunny, with a high near 54. Calm wind becoming south around 5 mph in the morning.
Friday Night
Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 32.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 44.
Sunday Night
Mostly clear, with a low around 22.
Monday
Mostly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur TN
 35.54°N 84.81°W (Elev. 682 ft)
Last Update:
12:31 am EST Dec 9, 2025
Forecast Valid:
5am EST Dec 9, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation