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.

A Few Clouds

37°F

3°C

Humidity 60%
Wind Speed SW 9 mph
Barometer 29.97 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 18 Mar 2:45 pm CDT
Extended Forecast for

Darien WI

  • Tonight

    Tonight: A slight chance of freezing rain between 1am and 2am, then a chance of rain. Increasing clouds, with a low around 30. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain/Freezing
    Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 7am. Patchy fog between 8am and 11am. Otherwise, partly sunny, with a high near 47. Calm wind becoming east around 5 mph in the afternoon.

    High: 47 °F

    Chance Rain
    and Patchy
    Fog then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. East wind around 5 mph becoming southwest after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 58. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 58 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. Northwest wind around 5 mph.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. Southwest wind around 10 mph becoming northeast after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 51. North wind around 15 mph.

    High: 51 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of freezing rain between 1am and 2am, then a chance of rain. Increasing clouds, with a low around 30. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
A 30 percent chance of rain, mainly before 7am. Patchy fog between 8am and 11am. Otherwise, partly sunny, with a high near 47. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 33. East wind around 5 mph becoming southwest after midnight.
Friday
Mostly cloudy, with a high near 58. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 37. Northwest wind around 5 mph.
Saturday
Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 39. Southwest wind around 10 mph becoming northeast after midnight.
Sunday
Mostly cloudy, with a high near 51. North wind around 15 mph.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly cloudy, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
2:57 pm CDT Mar 18, 2026
Forecast Valid:
3pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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