| NWS Forecast for: Lavaca County Issued by: National Weather Service Austin/San Antonio, TX Last Update: 411 AM CDT Wed Sep 2 2026 | |
| Today: Partly cloudy. A slight chance of showers and thunderstorms this afternoon. Hot with highs around 100. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Highest heat index readings up to 110. Tonight: Partly cloudy. A slight chance of showers and thunderstorms in the evening. Humid with lows in the upper 70s. South winds 10 to 15 mph. Chance of rain 20 percent. Thursday: Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 90s. South winds around 5 mph, becoming southeast 10 to 15 mph in the afternoon. Highest heat index readings up to 110. Thursday Night: Partly cloudy. Humid with lows in the mid 70s. Southeast winds 10 to 15 mph, diminishing to around 5 mph after midnight. Friday: Partly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. Temperature falling into the lower 90s in the afternoon. Southeast winds 5 to 10 mph. Chance of rain 50 percent. Highest heat index readings up to 108. Friday Night: Mostly clear. Lows in the mid 70s. Saturday: Mostly sunny in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Chance of rain 40 percent. Highest heat index readings up to 110. Saturday Night: Mostly clear. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Sunday: Mostly sunny with a slight chance of showers and thunderstorms in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Chance of rain 40 percent. Highest heat index readings up to 110. Sunday Night And Labor Day: Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the upper 90s. Highest heat index readings up to 110. Monday Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. Tuesday: Partly cloudy in the morning, then mostly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Chance of rain 30 percent. Highest heat index readings up to 110. | |
| Zone Forecast: Lavaca County | |
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