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

Mosquito months in Broward County

Mosquitoes in Broward County, FL can be active in any month. The worst stretch is March to November.

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 Broward County, and when

• No off-season here: tip out standing water every week, all year.
• A yard treatment matters most March to November.
• 6 West Nile cases since 2016 (last 2020): you should use repellent at dusk March to November, more so if over 60.

Broward County against the rest of FL

Broward County has the 1st longest season of 67 FL counties, at 365 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 76.3°F.

• Charlotte County: all year (365 days, 2 WNV)
• Collier County: all year (365 days, 11 WNV)

West Nile in Broward County

From 1999 to 2025, CDC ArboNET counted 15 human West Nile cases in Broward County (10 neuroinvasive) across 5 years. The worst was 2020 with 6; the latest was 2020.

More: how the dates are worked out · where mosquitoes never stop.