Mosquito season in Osceola County, FL: when it starts and ends
Mosquito months in Osceola County
In a normal year mosquito season in Osceola County, FL starts around January 14 and ends around January 10, about 52 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Osceola County, and when
- Start tipping out standing water weekly by December 31.
- Book any yard treatment for mid January, ahead of the August peak.
- Repellent can go away after January 10.
- No West Nile cases since 2016, so bites in Osceola County are a nuisance; check window screens.
Osceola County against the rest of FL
Osceola County has the 18th longest season of 67 FL counties, at 361 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 72.6°F.
- Flagler County: January 19 to January 16 (362 days, 0 WNV)
- Palm Beach County: January 25 to January 22 (362 days, 5 WNV)
- Lake County: January 17 to January 13 (361 days, 1 WNV)
- Glades County: January 18 to January 14 (361 days, 1 WNV)
West Nile in Osceola County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Osceola County (1 neuroinvasive) across 1 year. The worst was 2010 with 1; the latest was 2010.
More: how the dates are worked out · where mosquitoes never stop.