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.

Mostly Cloudy

43°F

6°C

Humidity 86%
Wind Speed Calm
Barometer 29.96 in (1014.6 mb)
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Last update 21 Mar 1:54 am CDT
Extended Forecast for

Byron IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. East southeast wind around 5 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 78. East southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Southwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 20 mph.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain, mainly between 10am and 4pm. Mostly cloudy, with a high near 48. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 48 °F

    Chance Rain
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. East southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 78. East southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 47. Southwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 20 mph.
Sunday
A 30 percent chance of rain, mainly between 10am and 4pm. Mostly cloudy, with a high near 48. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 26. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 48.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 56.
Wednesday Night
Mostly cloudy, with a low around 45.
Thursday
A chance of showers. Partly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 29.
Friday
Mostly sunny, with a high near 46.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Byron IL
 42.13°N 89.27°W
Last Update:
1:11 am CDT Mar 21, 2026
Forecast Valid:
2am CDT Mar 21, 2026-6pm CDT Mar 27, 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