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Marietta, IL Weather Forecast
Marietta, IL Weather Forecast Date: 637 PM CDT Wed Oct 07 2026
The area/counties/county of: Fulton, including the city of Canton.or toggle through each period.
Tonight... Mostly clear. Lows in the lower 50s. Northwest winds around 5 mph this evening, becoming light and variable.
Thursday... Sunny. Highs in the upper 70s. North winds around 5 mph.
Thursday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. Light and variable winds, becoming east around 5 mph after midnight.
Friday... Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph.
Friday Night... Clear. Lows in the lower 60s. South winds 5 to 10 mph with gusts up to 20 mph.
Saturday... Sunny. Highs in the mid 80s.
Saturday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s.
Sunday... Mostly sunny. Highs in the upper 70s.
Sunday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 50s.
Columbus Day... Partly cloudy. Highs in the lower 80s. Lows in the lower 50s.
Monday Night... Partly cloudy. Highs in the lower 80s. Lows in the lower 50s.
Tuesday... Partly cloudy. Highs in the mid 60s. Lows in the mid 40s.
POP = Probability of Precipitation
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