Mosquito season in Harris County, GA: when it starts and ends
Mosquito months in Harris County
In a normal year mosquito season in Harris County, GA starts around March 3 and ends around December 1, about 39 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Harris County, and when
- Start tipping out standing water weekly by February 17.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after December 1.
- No West Nile cases since 2016, so bites in Harris County are a nuisance; check window screens.
Harris County against the rest of GA
Harris County has the 68th longest season of 159 GA counties, at 273 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 64.8°F.
- Ware County: March 1 to December 1 (275 days, 1 WNV)
- Laurens County: February 26 to November 27 (274 days, 0 WNV)
- Calhoun County: February 27 to November 26 (272 days, 0 WNV)
- Spalding County: March 2 to November 29 (272 days, 0 WNV)
West Nile in Harris County
CDC ArboNET lists no human West Nile cases for Harris County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
Background: when the season starts across the US; how the dates are worked out.