Mosquito season in Effingham County, GA: when it starts and ends

Mosquito months in Effingham County

In a normal year mosquito season in Effingham County, GA starts around February 13 and ends around January 9, about 47 weeks.

What to do in Effingham County, and when

Start tipping out standing water weekly by January 30.
Book any yard treatment for mid February, ahead of the July peak.
Repellent can go away after January 9.
No West Nile cases since 2016, so bites in Effingham County are a nuisance; check window screens.

Effingham County against the rest of GA

Effingham County has the 5th longest season of 159 GA counties, at 330 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 66.5°F.

Candler County: February 12 to January 10 (332 days, 1 WNV)
Charlton County: February 3 to December 30 (330 days, 0 WNV)
Atkinson County: February 15 to January 11 (330 days, 0 WNV)
Colquitt County: February 18 to January 14 (330 days, 0 WNV)

West Nile in Effingham County

CDC ArboNET lists no human West Nile cases for Effingham County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.

See how the dates are worked out, and where mosquitoes never stop.