Mosquito season in Jackson County, TX: when it starts and ends
Mosquito months in Jackson County
In a normal year mosquito season in Jackson County, TX starts around January 21 and ends around January 1, about 49 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Jackson 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 January 1.
- No West Nile cases since 2016, so bites in Jackson County are a nuisance; check window screens.
Jackson County against the rest of TX
Jackson County has the 15th longest season of 254 TX counties, at 345 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 71°F.
- Kleberg County: January 14 to December 28 (348 days, 0 WNV)
- Victoria County: January 20 to January 1 (346 days, 1 WNV)
- Matagorda County: January 22 to January 1 (344 days, 1 WNV)
- Calhoun County: January 27 to January 4 (342 days, 0 WNV)
West Nile in Jackson County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Jackson County (2 neuroinvasive) across 2 years. The worst was 2015 with 1; the latest was 2015.
Background: where mosquitoes never stop; how the dates are worked out.