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Rio Grande Reservoir, OH Weather Forecast
Rio Grande Reservoir, OH Weather Forecast Date: 233 PM EDT Fri Aug 28 2026
The area/counties/county of: Gallia, including the city of Gallipolis.or toggle through each period.
Tonight... Mostly clear. Lows in the upper 50s. Northeast winds around 5 mph.
Saturday... Areas of dense fog in the morning. Sunny. Highs in the upper 80s. Northeast winds around 5 mph.
Saturday Night... Partly cloudy. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny, hot with highs around 90. Southwest winds around 5 mph.
Sunday Night... Mostly clear. Lows in the upper 60s. South winds around 5 mph in the evening, becoming light and variable.
Monday... Mostly clear. Hot. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 100.
Tuesday... Mostly clear. Hot. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 100.
Wednesday... Partly cloudy. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 100.
Wednesday Night... Partly cloudy. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 100.
Thursday... Partly cloudy. A chance of showers. Hot. Highs in the lower 90s. Lows around 70. Chance of rain 30%. Heat index values up to 100.
Thursday Night... Partly cloudy. A chance of showers. Hot. Highs in the lower 90s. Lows around 70. Chance of rain 30%. Heat index values up to 100.
POP = Probability of Precipitation
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