Mosquito season in Brewster County, TX: when it starts and ends
Mosquito months in Brewster County
In a normal year mosquito season in Brewster County, TX starts around February 21 and ends around December 2, about 41 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Brewster County, and when
- Start tipping out standing water weekly by February 7.
- Book any yard treatment for late February, ahead of the July peak.
- Repellent can go away after December 2.
- No West Nile cases since 2016, so bites in Brewster County are a nuisance; check window screens.
Brewster County against the rest of TX
Brewster County has the 79th longest season of 254 TX counties, at 284 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 67.8°F.
- Williamson County: February 23 to December 5 (285 days, 13 WNV)
- Edwards County: February 24 to December 6 (285 days, 0 WNV)
- Smith County: February 23 to December 4 (284 days, 19 WNV)
- Pecos County: February 23 to December 1 (281 days, 1 WNV)
West Nile in Brewster County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Brewster County (0 neuroinvasive) across 1 year. The worst was 2012 with 1; the latest was 2012.
See how the dates are worked out, and when mosquitoes go away for the winter.