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.

Mostly Cloudy

52°F

11°C

Humidity 67%
Wind Speed S 12 mph
Barometer 29.90 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 21 Mar 9:45 am CDT
Extended Forecast for

Darien WI

  • Today

    Today: Mostly sunny, with a high near 70. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 70 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. Southwest wind 5 to 10 mph becoming northeast after midnight.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain between 8am and 1pm. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. North wind 5 to 15 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 46. North wind around 5 mph.

    High: 46 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. East wind around 5 mph becoming south after midnight.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. Southwest wind 5 to 15 mph.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind around 5 mph becoming east after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 70. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 43. Southwest wind 5 to 10 mph becoming northeast after midnight.
Sunday
A slight chance of rain between 8am and 1pm. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 24. North wind 5 to 15 mph.
Monday
Sunny, with a high near 46. North wind around 5 mph.
Monday Night
Mostly cloudy, with a low around 30. East wind around 5 mph becoming south after midnight.
Tuesday
Mostly cloudy, with a high near 55. Southwest wind 5 to 15 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind around 5 mph becoming east after midnight.
Wednesday
Mostly cloudy, with a high near 52.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 41.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 58.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 43.
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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:
10:57 am CDT Mar 21, 2026
Forecast Valid:
11am CDT Mar 21, 2026-6pm CDT Mar 27, 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