Port Lavaca Weather Forecast
- 75
- 84
Chance Thunderstorms
- 75
- 79
Thunderstorms
- 76
- 82
Rain Showers
- 75
- 80
Rain Showers
- 74
- 79
Rain Showers Likely
- 75
- 79
Chance Thunderstorms
Today 20 May Coastal Calhoun
Mostly cloudy. Showers and Thunderstorms likely this morning. Highs in the upper 80s. East Winds 5 to 10 Mph, increasing to southeast 10 to 15 Mph this afternoon. Chance of rain 70 percent.
Tonight 20 May Coastal Calhoun
Mostly cloudy. A chance of Showers and Thunderstorms after midnight. Lows in the upper 70s. Southeast Winds 10 to 15 Mph, Diminishing to 5 to 10 Mph after midnight. Chance of rain 30 percent.
Port Lavaca Temperature Statistics
May Temperature
Palacios Municipal Airport (23 miles)
Lowest 3 May, 2026
55.7 °FAverage May
75.5 °FHighest 9 May, 2026
88.6 °F
Climate (2021–Present)
Palacios Municipal Airport (23 miles)
Average Low 2021–2026
65.4 °FAverage 2021–2026
73.1 °FAverage High 2021–2026
81 °F