Mosquito season in Lavaca County, TX: when it starts and ends
Mosquito months in Lavaca County
In a normal year mosquito season in Lavaca County, TX starts around January 30 and ends around December 27, about 47 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lavaca County, and when
- Start tipping out standing water weekly by January 16.
- Book any yard treatment for late January, ahead of the August peak.
- Repellent can go away after December 27.
- No West Nile cases since 2016, so bites in Lavaca County are a nuisance; check window screens.
Lavaca County against the rest of TX
Lavaca County has the 31st longest season of 254 TX counties, at 331 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 71.1°F.
- Bee County: January 29 to December 27 (332 days, 1 WNV)
- Frio County: January 26 to December 23 (331 days, 0 WNV)
- McMullen County: January 21 to December 17 (330 days, 0 WNV)
- Webb County: January 31 to December 27 (330 days, 3 WNV)
West Nile in Lavaca County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Lavaca County (1 neuroinvasive) across 2 years. The worst was 2013 with 1; the latest was 2013.
More: how the dates are worked out · where mosquitoes never stop.