Mosquito season in McCulloch County, TX: when it starts and ends
Mosquito months in McCulloch County
In a normal year mosquito season in McCulloch County, TX starts around March 4 and ends around November 27, about 38 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McCulloch County, and when
- Start tipping out standing water weekly by February 18.
- Book any yard treatment for early March, ahead of the August peak.
- Repellent can go away after November 27.
- No West Nile cases since 2016, so bites in McCulloch County are a nuisance; check window screens.
McCulloch County against the rest of TX
McCulloch County has the 119th longest season of 254 TX counties, at 268 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65.4°F.
- Burnet County: March 2 to November 25 (268 days, 1 WNV)
- Kaufman County: March 4 to November 27 (268 days, 9 WNV)
- Freestone County: March 4 to November 26 (267 days, 3 WNV)
- Hays County: March 4 to November 26 (267 days, 6 WNV)
West Nile in McCulloch County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in McCulloch County (0 neuroinvasive) across 1 year. The worst was 2005 with 1; the latest was 2005.
Background: when mosquitoes go away for the winter; how the dates are worked out.