Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Fort Atkinson WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. North wind 5 to 10 mph.

    Low: 65 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Northeast wind 5 to 10 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Northeast wind 5 to 10 mph becoming light east  in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming northwest around 5 mph.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 83. Calm wind becoming south around 5 mph in the morning.  Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 83. Northeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 59. Northeast wind 5 to 10 mph becoming light east in the evening.
Wednesday
Sunny, with a high near 84. Calm wind becoming northwest around 5 mph.
Wednesday Night
Mostly clear, with a low around 62. Calm wind.
Thursday
Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Calm wind becoming south around 5 mph in the morning. Chance of precipitation is 40%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Atkinson WI
 42.92°N 88.84°W (Elev. 797 ft)
12:31 am CDT Jul 28, 2026
12am CDT Jul 28, 2026-6pm CDT Aug 3, 2026
 
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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