Mosquito season in Okaloosa County, FL: when it starts and ends
Mosquito months in Okaloosa County
In a normal year mosquito season in Okaloosa County, FL starts around February 25 and ends around December 5, about 40 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Okaloosa County, and when
- Start tipping out standing water weekly by February 11.
- Book any yard treatment for late February, ahead of the July peak.
- Repellent can go away after December 5.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk May to September, more so if over 60.
Okaloosa County against the rest of FL
Okaloosa County has the 66th longest season of 67 FL counties, at 283 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 67°F.
- Gadsden County: February 28 to December 10 (285 days, 1 WNV)
- Leon County: February 25 to December 6 (284 days, 3 WNV)
- Gilchrist County: February 28 to December 6 (281 days, 0 WNV)
West Nile in Okaloosa County
From 1999 to 2025, CDC ArboNET counted 14 human West Nile cases in Okaloosa County (10 neuroinvasive) across 4 years. The worst was 2003 with 8; the latest was 2023.
Background: when the season starts across the US; how the dates are worked out.