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

Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Current conditions at

Davenport Municipal Airport (KDVN)

Lat: 41.61°NLon: 90.59°WElev: 741ft.

Fair

23°F

-5°C

Humidity 55%
Wind Speed NW 20 G 29 mph
Barometer 30.07 in (1018.9 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 14 Jan 4:52 pm CST
Extended Forecast for

Port Byron IL

  • Tonight

    Tonight: Clear, with a low around 14. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 14 °F

    Clear

  • Thursday

    Thursday: A 30 percent chance of snow after 5pm. Increasing clouds, with a high near 28. Northwest wind 5 to 10 mph becoming south in the afternoon.

    High: 28 °F

    Sunny then
    Chance Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a temperature rising to around 31 by 5am. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 27 °F⇑

    Snow Likely
    then Chance
    Snow

  • Friday

    Friday: A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 36. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 36 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Snow Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 15.

    High: 15 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 19.

    High: 19 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 14. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
A 30 percent chance of snow after 5pm. Increasing clouds, with a high near 28. Northwest wind 5 to 10 mph becoming south in the afternoon.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a temperature rising to around 31 by 5am. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday
A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 36. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
Mostly cloudy, with a high near 15.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 19.
Sunday Night
Mostly cloudy, with a low around 6.
M.L.King Day
Mostly sunny, with a high near 14.
Monday Night
Mostly clear, with a low around 3.
Tuesday
Mostly sunny, with a high near 21.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 28.
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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:
3:16 pm CST Jan 14, 2026
Forecast Valid:
5pm CST Jan 14, 2026-6pm CST Jan 21, 2026
 
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