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Vienna, TX Weather Forecast
Vienna, TX Weather Forecast Date: 124 AM CDT Sun Sep 20 2026
The area/counties/county of: Lavaca, including the city of Hallettsville.or toggle through each period.
Rest of Tonight... Partly cloudy. Lows in the lower 70s. Southeast winds around 5 mph.
Sunday... Partly cloudy. Highs in the upper 90s. Southeast winds 5 to 10 mph. Highest heat index readings up to 108.
Sunday Night... Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph.
Monday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the upper 90s. East winds 5 to 10 mph. Highest heat index readings up to 108.
Monday Night... Mostly clear. Lows in the lower 70s. Southeast winds 5 to 10 mph in the evening, becoming light and variable.
Tuesday... Mostly clear. Highs in the upper 90s. Lows in the mid 70s. Highest heat index readings up to 105.
Wednesday... Mostly clear. Highs in the upper 90s. Lows in the mid 70s. Highest heat index readings up to 105.
Wednesday Night... Partly cloudy. Lows in the lower 70s. Highs in the upper 90s.
Thursday... Partly cloudy. Lows in the lower 70s. Highs in the upper 90s.
Friday... Partly cloudy. Lows in the lower 70s. Highs in the upper 90s.
POP = Probability of Precipitation
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