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

Mosquito months in DeSoto County

In a normal year mosquito season in DeSoto County, FL starts around January 28 and ends around January 11, about 50 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 DeSoto County, and when

• Start tipping out standing water weekly by January 14.
• Book any yard treatment for late January, ahead of the August peak.
• Repellent can go away after January 11.
• No West Nile cases since 2016, so bites in DeSoto County are a nuisance; check window screens.

DeSoto County against the rest of FL

DeSoto County has the 30th longest season of 67 FL counties, at 348 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 72.5°F.

• Hernando County: January 24 to January 9 (350 days, 0 WNV)
• St. Johns County: January 25 to January 10 (350 days, 2 WNV)
• Bay County: January 23 to January 5 (347 days, 10 WNV)
• Bradford County: January 23 to January 4 (346 days, 0 WNV)

West Nile in DeSoto County

From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in DeSoto County (1 neuroinvasive) across 2 years. The worst was 2010 with 1; the latest was 2010.

Background: where mosquitoes never stop; how the dates are worked out.