Weather WorldHerculaneum, MO 7-Day Night Weather Forecast
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Herculaneum, MO Weather Forecast
Herculaneum, MO Weather Forecast Date: 747 PM CDT Mon Sep 21 2026
The area/counties/county of: Monroe County Il, Jefferson County Mo.or toggle through each period.
Tonight... Cloudy with a slight chance of very light drizzle. Lows in the lower 60s. Northeast winds 5 to 10 mph.
Tuesday... Mostly cloudy. A slight chance of very light drizzle in the morning. Highs in the mid 70s. North winds 5 to 10 mph.
Tuesday Night... Mostly cloudy. Lows in the mid 50s. North winds 5 to 10 mph.
Wednesday... Mostly sunny. Highs in the mid 70s. North winds 5 to 10 mph.
Wednesday Night... Partly cloudy. Lows in the lower 50s. Northeast winds around 5 mph.
Thursday... Partly cloudy. Highs in the upper 70s. Lows in the mid 50s.
Friday... Partly cloudy. Highs in the upper 70s. Lows in the mid 50s.
Friday Night... Mostly cloudy. Lows in the mid 50s.
Saturday... Mostly cloudy. A 20% chance of showers. Highs in the mid 70s. Lows in the mid 50s.
Saturday Night... Mostly cloudy. A 20% chance of showers. Highs in the mid 70s. Lows in the mid 50s.
Sunday... Partly cloudy with a 20% chance of showers. Highs in the lower 80s. Lows in the upper 50s.
POP = Probability of Precipitation
Herculaneum Radar Loop
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