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

Mosquito months in Seminole County

In a normal year mosquito season in Seminole County, GA starts around February 17 and ends around January 10, about 47 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Seminole County, and when

• Start tipping out standing water weekly by February 3.
• Book any yard treatment for mid February, ahead of the July peak.
• Repellent can go away after January 10.
• No West Nile cases since 2016, so bites in Seminole County are a nuisance; check window screens.

Seminole County against the rest of GA

Seminole County has the 8th longest season of 159 GA counties, at 327 days against 347 in Glynn County and 199 in Union County. Its mean temperature is 67.2°F.

• Atkinson County: February 15 to January 11 (330 days, 0 WNV)
• Colquitt County: February 18 to January 14 (330 days, 0 WNV)
• Coffee County: February 15 to January 6 (325 days, 0 WNV)
• Cook County: February 18 to January 9 (325 days, 0 WNV)

West Nile in Seminole County

From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Seminole County (1 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.

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