Mosquito season in La Salle County, TX: when it starts and ends
Mosquito months in La Salle County
In a normal year mosquito season in La Salle County, TX starts around January 20 and ends around December 19, about 48 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in La Salle County, and when
- Start tipping out standing water weekly by January 6.
- Book any yard treatment for mid January, ahead of the August peak.
- Repellent can go away after December 19.
- No West Nile cases since 2016, so bites in La Salle County are a nuisance; check window screens.
La Salle County against the rest of TX
La Salle County has the 27th longest season of 254 TX counties, at 333 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 72.3°F.
- Comal County: February 10 to January 13 (337 days, 0 WNV)
- Live Oak County: January 23 to December 25 (336 days, 0 WNV)
- Karnes County: January 28 to December 27 (333 days, 1 WNV)
- Bee County: January 29 to December 27 (332 days, 1 WNV)
West Nile in La Salle County
CDC ArboNET lists no human West Nile cases for La Salle County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
See how the dates are worked out, and where mosquitoes never stop.