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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

43°F

6°C

Humidity 29%
Wind Speed NE 8 mph
Barometer 30.41 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 23 Mar 3:45 pm CDT
Extended Forecast for

Alden IL

  • Tonight

    Tonight: Increasing clouds, with a low around 26. East northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.

    Low: 26 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 50. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 50 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 63. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 63 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. South southwest wind around 5 mph, with gusts as high as 15 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 26. East northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 50. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 36. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 63. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 49. South southwest wind around 5 mph, with gusts as high as 15 mph.
Thursday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 70.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 24.
Saturday
Sunny, with a high near 50.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Partly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alden IL
 42.46°N 88.52°W
Last Update:
2:46 pm CDT Mar 23, 2026
Forecast Valid:
4pm CDT Mar 23, 2026-6pm CDT Mar 30, 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