Mosquito season in Union County, FL: when it starts and ends
Mosquito months in Union County
In a normal year mosquito season in Union County, FL starts around January 23 and ends around January 4, about 49 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Union County, and when
- Start tipping out standing water weekly by January 9.
- Book any yard treatment for late January, ahead of the July peak.
- Repellent can go away after January 4.
- No West Nile cases since 2016, so bites in Union County are a nuisance; check window screens.
Union County against the rest of FL
Union County has the 34th longest season of 67 FL counties, at 346 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 69°F.
- Bradford County: January 23 to January 4 (346 days, 0 WNV)
- Clay County: January 23 to January 4 (346 days, 3 WNV)
- Volusia County: January 31 to January 10 (344 days, 3 WNV)
- Gulf County: January 31 to January 5 (339 days, 0 WNV)
West Nile in Union County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Union County (1 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.
More: how the dates are worked out · where mosquitoes never stop.