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City of Janesville, WIJanesville, WI 7-Day Night Weather Forecast
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Janesville, WI Weather Forecast
Janesville, WI Weather Forecast Date: 1030 PM CDT Wed Sep 23 2026
The area/counties/county of: Rock, including the cities of: Janesville and Beloit.or toggle through each period.
Tonight... Partly cloudy. Lows around 50. Northeast winds up to 10 mph.
Thursday... Partly sunny. Highs in the mid 60s. East winds 5 to 10 mph.
Thursday Night... Mostly cloudy. Lows in the mid 50s. East winds up to 5 mph.
Friday... Partly sunny. Highs in the mid 60s. East winds up to 10 mph.
Friday Night... Partly cloudy. Lows in the upper 40s. East winds up to 5 mph.
Saturday... Partly sunny. Highs in the mid 60s.
Saturday Night... Mostly cloudy. A 20% chance of light rain showers after midnight. Lows around 50.
Sunday... Mostly cloudy. Highs in the mid 60s.
Sunday Night... Mostly cloudy through around midnight then becoming partly cloudy. Lows in the upper 40s.
Monday... Partly sunny. Highs in the upper 60s.
Monday Night... Partly cloudy. Lows in the lower 50s.
Tuesday... Partly sunny with a 50% chance of light rain showers. Highs in the upper 60s.
Tuesday Night... Rain showers likely through around midnight, then rain showers likely and slight chance of thunderstorms after midnight. Lows in the upper 50s. Chance of precipitation 70%.
POP = Probability of Precipitation
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