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

Hazardous Weather Conditions

Current conditions at

Davenport Municipal Airport (KDVN)

Lat: 41.61°NLon: 90.59°WElev: 741ft.

Fair

84°F

29°C

Humidity 74%
Wind Speed S 7 mph
Barometer 29.89 in (1011.2 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 2 Sep 7:52 pm CDT
Extended Forecast for

Port Byron IL

Extreme Heat Warning September 2, 08:23pm until September 4, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 2, 08:23pm until September 4, 07:00pm

    NOW until 7:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 93. Heat index values as high as 101. Southwest wind 5 to 10 mph.

    High: 93 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms between 1am and 2am. Mostly clear, with a low around 75. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 93. Heat index values as high as 101. Southwest wind around 5 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers after 1am. Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Tonight
A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 74. South wind around 5 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 93. Heat index values as high as 101. Southwest wind 5 to 10 mph.
Thursday Night
A slight chance of showers and thunderstorms between 1am and 2am. Mostly clear, with a low around 75. South wind around 5 mph. Chance of precipitation is 20%.
Friday
Sunny, with a high near 93. Heat index values as high as 101. Southwest wind around 5 mph.
Friday Night
A 40 percent chance of showers after 1am. Mostly clear, with a low around 72.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 68.
Labor Day
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Byron IL
 41.6°N 90.33°W (Elev. 633 ft)
Last Update:
8:16 pm CDT Sep 2, 2026
Forecast Valid:
8pm CDT Sep 2, 2026-6pm CDT Sep 9, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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