| NWS Forecast for: Lavaca County Issued by: National Weather Service Austin/San Antonio, TX Last Update: 353 AM CDT Mon Sep 7 2026 |  |
| Today: Partly cloudy. A slight chance of showers and thunderstorms this afternoon. Highs in the upper 90s. Southwest winds around 5 mph, becoming southeast this afternoon. Chance of rain 20 percent. Highest heat index readings up to 105. Tonight: Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Tuesday: Mostly sunny. Highs in the upper 90s. South winds 5 to 10 mph. Highest heat index readings up to 105. Tuesday Night: Mostly clear. Humid with lows in the mid 70s. Southeast winds 5 to 10 mph. Wednesday: Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Temperature falling into the lower 90s in the afternoon. Light and variable winds, becoming southeast 5 to 10 mph in the afternoon. Highest heat index readings up to 106. Wednesday Night: Mostly clear. Lows in the mid 70s. Thursday: Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Thursday Night Through Saturday Night: Mostly clear. Lows in the mid 70s. Highs in the upper 90s. Highest heat index readings up to 110. Sunday: Partly cloudy in the morning, then mostly sunny with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Highest heat index readings up to 110. | |
| Zone Forecast: Lavaca County | |
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