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

Hot Temperatures in the West; Heavy Rainfall and Flooding Potential in the Southwest

Hot to extremely hot temperatures are in place across coastal southern California again today and the interior Northwest U.S into Thursday, with the Pacific Northwest carrying the potential for record-breaking high temperatures. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring heavy rainfall and the potential for flooding through the week. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

63°F

17°C

Humidity 88%
Wind Speed SW 7 mph
Barometer 29.80 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 3 Sep 7:45 am CDT
Extended Forecast for

4 Miles S Fort Atkinson WI

  • Today

    Today: Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 69. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers
    Likely

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 43. Northwest wind 5 to 10 mph.

    Low: 43 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 64. West wind 5 to 10 mph.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely. Mostly cloudy, with a low around 50. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a high near 62. West wind around 15 mph.

    High: 62 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. West wind 5 to 10 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 64. West wind 5 to 10 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 3pm. Mostly cloudy, with a high near 69. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 43. Northwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 64. West wind 5 to 10 mph.
Thursday Night
Showers likely. Mostly cloudy, with a low around 50. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Partly sunny, with a high near 62. West wind around 15 mph.
Friday Night
Partly cloudy, with a low around 44. West wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 64. West wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 43.
Monday
Mostly sunny, with a high near 70.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Fort Atkinson WI
 42.86°N 88.85°W (Elev. 899 ft)
Last Update:
6:54 am CDT Sep 3, 2025
Forecast Valid:
8am CDT Sep 3, 2025-6pm CDT Sep 9, 2025
 
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