Mosquito season in DeKalb County, GA: when it starts and ends
Mosquito months in DeKalb County
In a normal year mosquito season in DeKalb County, GA starts around March 12 and ends around November 22, about 36 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in DeKalb County, and when
- Start tipping out standing water weekly by February 26.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 22.
- 28 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to September, and check GA spray notices.
DeKalb County against the rest of GA
DeKalb County has the 105th longest season of 159 GA counties, at 255 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 62.1°F.
- Greene County: March 12 to November 23 (256 days, 0 WNV)
- Taliaferro County: March 12 to November 23 (256 days, 0 WNV)
- Gwinnett County: March 12 to November 22 (255 days, 7 WNV)
- Chattahoochee County: March 11 to November 20 (254 days, 0 WNV)
West Nile in DeKalb County
From 1999 to 2025, CDC ArboNET counted 60 human West Nile cases in DeKalb County (36 neuroinvasive) across 16 years. The worst was 2024 with 13; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.