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

Heat Builds in the West; Severe Thunderstorms and Heavy Rain in the Upper Midwest and Mid-Mississippi Valley; Extremely Critical Fire Weather in the Northwest on Saturday

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rainfall are expected over parts of the Upper Midwest to mid-Mississippi Valley today. Critical to extremely critical fire weather conditions from the Northwest and the northern Great Basin on Saturday and Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

68°F

20°C

Humidity 83%
Wind Speed SE 7 mph
Barometer 29.96 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 31 Jul 7:45 am CDT
Extended Forecast for

Edgerton WISimilar City Names

  • Today

    Today: Scattered showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Southeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Isolated
    Showers then
    Showers
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 11pm, then showers between 11pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 64. Southeast wind around 15 mph becoming northeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 64 °F

    Showers

  • Saturday

    Saturday: Showers and thunderstorms before 2pm, then a chance of showers. High near 74. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 61. North wind 10 to 15 mph.

    Low: 61 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 78. North wind 10 to 15 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55. Northeast wind 5 to 10 mph becoming light in the evening.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81. East wind around 5 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Scattered showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. Southeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 11pm, then showers between 11pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 64. Southeast wind around 15 mph becoming northeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers and thunderstorms before 2pm, then a chance of showers. High near 74. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Mostly cloudy, with a low around 61. North wind 10 to 15 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 78. North wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 55. Northeast wind 5 to 10 mph becoming light in the evening.
Monday
Sunny, with a high near 81. East wind around 5 mph.
Monday Night
Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Edgerton WISimilar City Names
 42.84°N 89.08°W (Elev. 866 ft)
Last Update:
6:51 am CDT Jul 31, 2026
Forecast Valid:
7am CDT Jul 31, 2026-6pm CDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation