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

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

32°F

0°C

Humidity 87%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 20 Apr 3:15 am CDT
Extended Forecast for

Alden IL

Freeze Warning April 20, 03:26am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning
  •  
    Freeze Warning April 20, 03:26am until April 20, 09:00am

    NOW until 9:00am Mon

    Freeze Warning

  • Overnight

    Low: 26 °F

    Frost

  • Monday

    Monday: Widespread frost before 9am. Otherwise, sunny, with a high near 54. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

    High: 54 °F

    Frost then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. West southwest wind around 5 mph becoming northeast after midnight. Winds could gust as high as 10 mph.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Breezy.

    High: 78 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

Detailed Forecast

Overnight
Widespread frost. Otherwise, mostly clear, with a low around 26. Calm wind.
Monday
Widespread frost before 9am. Otherwise, sunny, with a high near 54. Light and variable wind becoming south southwest 5 to 10 mph in the morning.
Monday Night
Mostly cloudy, with a low around 42. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 72. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 45. West southwest wind around 5 mph becoming northeast after midnight. Winds could gust as high as 10 mph.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 78. Breezy.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59.
Friday
A chance of showers. Mostly cloudy, with a high near 70.
Friday Night
A chance of showers. Mostly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alden IL
 42.46°N 88.52°W
Last Update:
2:51 am CDT Apr 20, 2026
Forecast Valid:
3am CDT Apr 20, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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