Lavaca Weather Forecast
- 73
- 99
Chance Thunderstorms
- 69
- 92
Slight Chance Thunderstorms
- 66
- 89
Partly Sunny
- 62
- 89
Partly Sunny
- 63
- 88
Partly Sunny
- 64
- 87
Mostly Cloudy
- 65
- 88
Partly Sunny
Today 20 Sep North and Central Sebastian
Mostly sunny. Highs around 90.
Tonight 20 Sep North and Central Sebastian
Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly this evening. Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 40 percent.
Lavaca Temperature Statistics
September Temperature
Fort Smith Regional Airport (10.6 miles)
Lowest 11 September, 2026
74.6 °FAverage September
90 °FHighest 4 September, 2026
106.6 °F
Climate (2021–2026)
Fort Smith Regional Airport (10.6 miles)
Average Low 2021–2026
54.4 °FAverage 2021–2026
65.1 °FAverage High 2021–2026
76.6 °F