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

Mosquito months in Cook County

In a normal year mosquito season in Cook County, GA starts around February 18 and ends around January 9, about 46 weeks.

What to do in Cook County, and when

Start tipping out standing water weekly by February 4.
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 Cook County are a nuisance; check window screens.

Cook County against the rest of GA

Cook County has the 10th longest season of 159 GA counties, at 325 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 66.1°F.

Seminole County: February 17 to January 10 (327 days, 0 WNV)
Coffee County: February 15 to January 6 (325 days, 0 WNV)
Brooks County: February 23 to January 14 (325 days, 0 WNV)
Ben Hill County: February 13 to January 3 (324 days, 2 WNV)

West Nile in Cook County

CDC ArboNET lists no human West Nile cases for Cook County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.

Background: when mosquitoes go away for the winter; how the dates are worked out.