Mosquito season in Gadsden County, FL: when it starts and ends

Mosquito months in Gadsden County

In a normal year mosquito season in Gadsden County, FL starts around February 28 and ends around December 10, about 41 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 Gadsden County, and when

• Start tipping out standing water weekly by February 14.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after December 10.
• 1 West Nile case since 2016 (last 2018): you should use repellent at dusk May to September, more so if over 60.

Gadsden County against the rest of FL

Gadsden County has the 64th longest season of 67 FL counties, at 285 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 67.4°F.

• Hamilton County: February 22 to December 7 (288 days, 0 WNV)
• Wakulla County: February 26 to December 11 (288 days, 1 WNV)
• Leon County: February 25 to December 6 (284 days, 3 WNV)
• Okaloosa County: February 25 to December 5 (283 days, 2 WNV)

West Nile in Gadsden County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Gadsden County (3 neuroinvasive) across 3 years. The worst was 2018 with 1; the latest was 2018.

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