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City of Marietta, OhioMarietta, OH 7-Day Night Weather Forecast
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Marietta, OH Weather Forecast
Marietta, OH Weather Forecast Date: 1148 AM EDT Wed Sep 02 2026
The area/counties/county of: Washington, including the cities of: Marietta and Belpre.or toggle through each period.
This Afternoon... Sunny, hot with highs in the lower 90s. Southwest winds around 5 mph. Heat index values up to 101.
Tonight... Mostly clear with a 20% chance of showers. Humid with lows in the lower 70s. Southwest winds around 5 mph. Heat index values up to 100 early in the evening.
Thursday... Sunny, hot with highs in the lower 90s. Southwest winds around 5 mph. Heat index values up to 102.
Thursday Night... Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Humid with lows in the lower 70s. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 50%. Heat index values up to 100 early in the evening.
Friday... Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 50%.
Friday Night... Mostly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 50%.
Saturday... Partly sunny. A chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 30%.
Saturday Night... Partly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 30%.
Sunday... Mostly clear. Highs in the lower 80s. Lows in the lower 60s.
Sunday Night... Mostly clear. Highs in the lower 80s. Lows in the lower 60s.
Labor Day... Partly cloudy. Highs in the lower 80s. Lows in the lower 60s.
POP = Probability of Precipitation
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