Mosquito season in McMullen County, TX: when it starts and ends
Mosquito months in McMullen County
In a normal year mosquito season in McMullen County, TX starts around January 21 and ends around December 17, about 47 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McMullen County, and when
- Start tipping out standing water weekly by January 7.
- Book any yard treatment for late January, ahead of the August peak.
- Repellent can go away after December 17.
- No West Nile cases since 2016, so bites in McMullen County are a nuisance; check window screens.
McMullen County against the rest of TX
McMullen County has the 32nd longest season of 254 TX counties, at 330 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 71.7°F.
- Frio County: January 26 to December 23 (331 days, 0 WNV)
- Lavaca County: January 30 to December 27 (331 days, 0 WNV)
- Webb County: January 31 to December 27 (330 days, 3 WNV)
- Lee County: February 17 to January 13 (330 days, 0 WNV)
West Nile in McMullen County
CDC ArboNET lists no human West Nile cases for McMullen County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
See how the dates are worked out, and where mosquitoes never stop.