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Waterloo, WI Weather Forecast
Waterloo, WI Weather Forecast Date: 1031 AM CDT Sat Sep 05 2026
The area/counties/county of: Jefferson, including the cities of: Watertown, Fort Atkinson, and Jefferson.or toggle through each period.
Rest of Today... Partly sunny. Highs in the upper 70s. Northeast winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the upper 50s. Northeast winds up to 10 mph.
Sunday... Mostly sunny. Highs around 80. East winds up to 5 mph.
Sunday Night... Partly cloudy. Lows in the upper 50s. East winds up to 5 mph.
Labor Day... Partly sunny. Highs around 80. Southeast winds up to 10 mph.
Monday Night... Partly cloudy through around midnight then becoming mostly cloudy. Lows in the lower 60s.
Tuesday... Partly sunny. Highs in the mid 80s.
Tuesday Night... Partly cloudy. Chance of light showers and thunderstorms through around midnight, then light showers likely and chance of thunderstorms after midnight. Lows in the upper 60s. Chance of precipitation 60%.
Wednesday... Partly sunny. Highs in the lower 80s.
Wednesday Night... Partly cloudy. Cooler. Lows in the upper 50s.
Thursday... Partly sunny. Highs in the upper 70s.
Thursday Night... Partly cloudy. Lows in the upper 50s.
POP = Probability of Precipitation
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