Mosquito season in Zavala County, TX: when it starts and ends
Mosquito months in Zavala County
In a normal year mosquito season in Zavala County, TX starts around January 20 and ends around December 26, about 49 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Zavala 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 26.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk April to October, more so if over 60.
Zavala County against the rest of TX
Zavala County has the 18th longest season of 254 TX counties, at 340 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 72.1°F.
- Matagorda County: January 22 to January 1 (344 days, 1 WNV)
- Calhoun County: January 27 to January 4 (342 days, 0 WNV)
- Chambers County: January 25 to December 31 (340 days, 2 WNV)
- Harris County: January 27 to January 2 (340 days, 188 WNV)
West Nile in Zavala County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Zavala County (4 neuroinvasive) across 4 years. The worst was 2023 with 1; the latest was 2023.
Background: where mosquitoes never stop; how the dates are worked out.