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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog

54°F

12°C

Humidity 100%
Wind Speed SE 7 mph
Barometer 29.92 in
Dewpoint 54°F (12°C)
Visibility 0.50 mi
Wind Chill52°F (11°C)
Last update 17 Apr 1:55 am CDT
Extended Forecast for

2 Miles NW Alden IL

Dense Fog Advisory April 17, 02:13am until April 17, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory April 17, 02:13am until April 17, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Overnight

    Low: 51 °F

    Dense Fog

  • Friday

    Friday: A 10 percent chance of showers and thunderstorms after 5pm. Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 77. Breezy, with a south southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 77 °F

    Dense Fog
    then Slight
    Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then a chance of showers. Low around 39. Breezy, with a south wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 39 °F

    Breezy.
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 47. Breezy, with a west northwest wind around 20 mph, with gusts as high as 30 mph.

    High: 47 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Areas of frost after 4am. Otherwise, mostly clear, with a low around 31. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Mostly Clear
    then Areas
    Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 47.

    High: 47 °F

    Areas Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Widespread frost after midnight. Otherwise, mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 9am. Otherwise, sunny, with a high near 54.

    High: 54 °F

    Frost then
    Sunny

Detailed Forecast

Overnight
Widespread dense fog. Otherwise, mostly cloudy, with a low around 51. Southeast wind around 5 mph, with gusts as high as 10 mph.
Friday
A 10 percent chance of showers and thunderstorms after 5pm. Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 77. Breezy, with a south southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
Showers and thunderstorms before 1am, then a chance of showers. Low around 39. Breezy, with a south wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Mostly sunny, with a high near 47. Breezy, with a west northwest wind around 20 mph, with gusts as high as 30 mph.
Saturday Night
Areas of frost after 4am. Otherwise, mostly clear, with a low around 31. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 47.
Sunday Night
Widespread frost after midnight. Otherwise, mostly clear, with a low around 29.
Monday
Widespread frost before 9am. Otherwise, sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Alden IL
 42.48°N 88.55°W
Last Update:
2:01 am CDT Apr 17, 2026
Forecast Valid:
2am CDT Apr 17, 2026-6pm CDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation