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

Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

72°F

22°C

Humidity 41%
Wind Speed N 8 mph
Barometer 30.10 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 22 Jul 3:45 pm CDT
Extended Forecast for

4 Miles WSW Fort Atkinson WI

  • Tonight

    Tonight: Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 77. Calm wind becoming southwest around 5 mph in the morning.

    High: 77 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 80. Light south wind increasing to 5 to 10 mph in the morning.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. South wind 5 to 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 91. West wind 5 to 10 mph.

    High: 91 °F

    Hot

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.
Thursday
Increasing clouds, with a high near 77. Calm wind becoming southwest around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 80. Light south wind increasing to 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 60. South wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph.
Sunday
Mostly sunny and hot, with a high near 91. West wind 5 to 10 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69.
Monday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Fort Atkinson WI
 42.9°N 88.93°W (Elev. 774 ft)
Last Update:
2:47 pm CDT Jul 22, 2026
Forecast Valid:
3pm CDT Jul 22, 2026-6pm CDT Jul 29, 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