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

Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture from the remnants of Odalys and Hurricane Polo will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Flood Watches have been issued through Wednesday in the southwest U.S. and moderate risk outlooks have been issued today through Thursday. Read More >

Current conditions at

Davenport Municipal Airport (KDVN)

Lat: 41.61°NLon: 90.59°WElev: 741ft.

Fair

71°F

22°C

Humidity 51%
Wind Speed SE 5 mph
Barometer 30.11 in (1019.1 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 28 Sep 11:52 am CDT
Extended Forecast for

Port Byron IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Calm wind.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Calm wind becoming southeast around 5 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 76. Southeast wind 5 to 10 mph.

    High: 76 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 64. Southeast wind 5 to 10 mph.

    Low: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 76.

    High: 76 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 71. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Calm wind.
Tonight
Mostly clear, with a low around 53. Calm wind becoming southeast around 5 mph.
Tuesday
Partly sunny, with a high near 76. Southeast wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 64. Southeast wind 5 to 10 mph.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 76.
Wednesday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 71. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Port Byron IL
 41.62°N 90.33°W (Elev. 627 ft)
Last Update:
6:21 am CDT Sep 28, 2026
Forecast Valid:
12pm CDT Sep 28, 2026-6pm CDT Oct 4, 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