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

Rockford, Greater Rockford Airport (KRFD)

Lat: 42.19°NLon: 89.09°WElev: 735ft.

A Few Clouds

64°F

18°C

Humidity 81%
Wind Speed SE 5 mph
Barometer 30.15 in (1020.4 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 8 Sep 12:54 am CDT
Extended Forecast for

Byron IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 59. Southeast wind around 5 mph.

    Low: 59 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 86. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 86 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 69. South wind 5 to 10 mph becoming west southwest after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Slight Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58. West wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: A chance of showers after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 59. Southeast wind around 5 mph.
Tuesday
Partly sunny, with a high near 86. South wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 69. South wind 5 to 10 mph becoming west southwest after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 70%.
Wednesday Night
Partly cloudy, with a low around 58. West wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 79.
Thursday Night
Clear, with a low around 52.
Friday
Sunny, with a high near 81.
Friday Night
A chance of showers after 1am. Partly cloudy, with a low around 61.
Saturday
A chance of showers before 1pm. Partly sunny, with a high near 82.
Saturday Night
A chance of showers. Partly cloudy, with a low around 58.
Sunday
A chance of showers. Partly sunny, with a high near 80.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 59.
Monday
A chance of showers. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Byron IL
 42.13°N 89.27°W
Last Update:
1:21 am CDT Sep 8, 2026
Forecast Valid:
1am CDT Sep 8, 2026-6pm CDT Sep 14, 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