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

Mosquito months in Union County

In a normal year mosquito season in Union County, GA starts around April 12 and ends around October 28, about 28 weeks.

What to do in Union County, and when

Start tipping out standing water weekly by March 29.
Book any yard treatment for mid April, ahead of the July peak.
Repellent can go away after October 28.
No West Nile cases since 2016, so bites in Union County are a nuisance; check window screens.

Union County against the rest of GA

Union County has the 159th longest season of 159 GA counties, at 199 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 55.9°F.

Lumpkin County: March 31 to November 3 (217 days, 0 WNV)
Fannin County: April 9 to October 30 (204 days, 0 WNV)

West Nile in Union County

CDC ArboNET lists no human West Nile cases for Union County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.

See how the dates are worked out, and when the season starts across the US.