Mosquito season in Brazoria County, TX: when it starts and ends
Mosquito months in Brazoria County
In a normal year mosquito season in Brazoria County, TX starts around January 19 and ends around January 7, about 50 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Brazoria County, and when
- Start tipping out standing water weekly by January 5.
- Book any yard treatment for mid January, ahead of the August peak.
- Repellent can go away after January 7.
- 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to October, and check TX spray notices.
Brazoria County against the rest of TX
Brazoria County has the 10th longest season of 254 TX counties, at 353 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 70.9°F.
- Nueces County: January 11 to January 1 (355 days, 14 WNV)
- San Patricio County: January 12 to January 1 (354 days, 2 WNV)
- Starr County: January 12 to December 29 (351 days, 0 WNV)
- Jim Hogg County: January 15 to December 30 (349 days, 1 WNV)
West Nile in Brazoria County
From 1999 to 2025, CDC ArboNET counted 31 human West Nile cases in Brazoria County (20 neuroinvasive) across 10 years. The worst was 2014 with 8; the latest was 2024.
See how the dates are worked out, and where mosquitoes never stop.