Mosquito season in Johnson County, GA: when it starts and ends
Mosquito months in Johnson County
In a normal year mosquito season in Johnson County, GA starts around March 8 and ends around November 22, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Johnson County, and when
- Start tipping out standing water weekly by February 22.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 22.
- 1 West Nile case since 2016 (last 2017): you should use repellent at dusk May to September, more so if over 60.
Johnson County against the rest of GA
Johnson County has the 94th longest season of 159 GA counties, at 259 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 64.2°F.
- Franklin County: March 7 to November 22 (260 days, 0 WNV)
- Emanuel County: March 8 to November 22 (259 days, 0 WNV)
- Treutlen County: March 8 to November 22 (259 days, 1 WNV)
- Stephens County: March 11 to November 24 (258 days, 1 WNV)
West Nile in Johnson County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Johnson County (2 neuroinvasive) across 2 years. The worst was 2017 with 1; the latest was 2017.
See how the dates are worked out, and when the season starts across the US.