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

Winter Weather Across Portions of the Mid-Atlantic; Heavy Rain Along the Gulf Coast and Southeast

A storm system will continue to slowly move through the Gulf Coast and Southeast U.S. over the next couple of days, bringing a heavy rainfall threat through the weekend. Isolated instances of flooding may occur. On the north side of this storm system, colder air will support areas of mixed wintry precipitation and light snow from the Tennessee Valley to the Mid-Atlantic Friday. Read More >

Hazardous Weather Conditions

Current conditions at

Davenport Municipal Airport (KDVN)

Lat: 41.61°NLon: 90.59°WElev: 741ft.

Overcast

16°F

-9°C

Humidity 65%
Wind Speed S 10 mph
Barometer NA
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 5 Dec 5:52 am CST
Extended Forecast for

Port Byron IL

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 31. Southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 31 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 20. Southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a steady temperature around 23. Northwest wind around 5 mph becoming east in the afternoon.

    High: 23 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Snow. Low around 16. East wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 16 °F

    Snow Likely
    then Snow

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Partly sunny, with a high near 22.

    High: 22 °F

    Chance Snow
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -3.

    Low: -3 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 23.

    High: 23 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 31. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 20. Southwest wind 5 to 10 mph becoming northwest after midnight.
Saturday
Increasing clouds, with a steady temperature around 23. Northwest wind around 5 mph becoming east in the afternoon.
Saturday Night
Snow. Low around 16. East wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Sunday
A 30 percent chance of snow before noon. Partly sunny, with a high near 22.
Sunday Night
Mostly cloudy, with a low around -3.
Monday
Partly sunny, with a high near 23.
Monday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 14.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A 50 percent chance of rain. Cloudy, with a low around 27.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 10.
Thursday
Partly sunny, with a high near 22.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Byron IL
 41.62°N 90.33°W (Elev. 627 ft)
Last Update:
6:31 am CST Dec 5, 2025
Forecast Valid:
6am CST Dec 5, 2025-6pm CST Dec 11, 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