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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Rain

61°F

16°C

Humidity 100%
Wind Speed NE 17 mph
Barometer 29.98 in
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 20 Sep 7:45 am CDT
Extended Forecast for

4 Miles WNW Beloit WI

  • Today

    Today: Showers and possibly a thunderstorm before 1pm, then isolated showers between 1pm and 3pm. Patchy fog before noon. High near 66. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers and
    Patchy Fog
    then
    Scattered
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 54. Northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 61. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly between 7pm and 1am. Mostly cloudy, with a low around 49. Northeast wind 10 to 15 mph.

    Low: 49 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. Northeast wind 10 to 15 mph.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. Northeast wind 5 to 10 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63. Northeast wind 10 to 15 mph.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Northeast wind 5 to 10 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before 1pm, then isolated showers between 1pm and 3pm. Patchy fog before noon. High near 66. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 54. Northeast wind around 15 mph, with gusts as high as 25 mph.
Monday
A 30 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 61. Northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 30 percent chance of showers, mainly between 7pm and 1am. Mostly cloudy, with a low around 49. Northeast wind 10 to 15 mph.
Tuesday
Partly sunny, with a high near 60. Northeast wind 10 to 15 mph.
Tuesday Night
Partly cloudy, with a low around 46. Northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 63. Northeast wind 10 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 47. Northeast wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Partly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Partly sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Beloit WI
 42.54°N 89.1°W (Elev. 889 ft)
Last Update:
6:26 am CDT Sep 20, 2026
Forecast Valid:
7am CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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