Mosquito season in Miami-Dade County, FL: when it starts and ends
Mosquito months in Miami-Dade County
Mosquitoes in Miami-Dade County, FL can be active in any month. The worst stretch is March to November.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Miami-Dade County, and when
- No off-season here: tip out standing water every week, all year.
- A yard treatment matters most March to November.
- 29 West Nile cases since 2016: you should wear EPA-registered repellent at dusk March to November, and check FL spray notices.
Miami-Dade County against the rest of FL
Miami-Dade County has the 9th longest season of 67 FL counties, at 365 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 75.4°F.
- Manatee County: all year (365 days, 1 WNV)
- Martin County: all year (365 days, 2 WNV)
- Monroe County: all year (365 days, 0 WNV)
- Orange County: all year (365 days, 0 WNV)
West Nile in Miami-Dade County
From 1999 to 2025, CDC ArboNET counted 59 human West Nile cases in Miami-Dade County (50 neuroinvasive) across 7 years. The worst was 2020 with 28; the latest was 2021.
Background: where mosquitoes never stop; how the dates are worked out.