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

Significant Coastal Impacts to the Eastern Seaboard; Tropical Storm Nolo to Impact Hawaii

A Nor'easter will bring significant coastal impacts to the Mid-Atlantic and New England through the weekend. Moderate to major coastal flooding, heavy rain, strong winds and high surf expected. Tropical Storm Nolo will continue to strengthen as it moves north toward the Big Island of Hawaii. Heavy rainfall may bring life-threatening, catastrophic flooding and mudslides through the weekend. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog/Mist

59°F

15°C

Humidity 94%
Wind Speed Calm
Barometer 30.34 in
Dewpoint 57°F (14°C)
Visibility 7.00 mi
Last update 25 Sep 7:45 am CDT
Extended Forecast for

Fort Atkinson WI

  • Today

    Today: A 20 percent chance of showers before 9am. Partly sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.

    High: 67 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. East wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 68. Calm wind becoming southeast around 5 mph in the morning.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 48. East wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68. Calm wind.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70. Calm wind.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 1pm. Increasing clouds, with a high near 70.

    High: 70 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
A 20 percent chance of showers before 9am. Partly sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 48. East wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 68. Calm wind becoming southeast around 5 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 48. East wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 68. Calm wind.
Sunday Night
Partly cloudy, with a low around 49. Calm wind.
Monday
Mostly sunny, with a high near 70. Calm wind.
Monday Night
Partly cloudy, with a low around 51. Calm wind.
Tuesday
A 30 percent chance of showers after 1pm. Increasing clouds, with a high near 70.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 69.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Atkinson WI
 42.9°N 88.84°W (Elev. 850 ft)
Last Update:
6:41 am CDT Sep 25, 2026
Forecast Valid:
8am CDT Sep 25, 2026-6pm CDT Oct 1, 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