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

Mosquito months in Liberty County

In a normal year mosquito season in Liberty County, FL starts around February 15 and ends around December 15, about 43 weeks.

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 Liberty County, and when

• Start tipping out standing water weekly by February 1.
• Book any yard treatment for mid February, ahead of the July peak.
• Repellent can go away after December 15.
• No West Nile cases since 2016, so bites in Liberty County are a nuisance; check window screens.

Liberty County against the rest of FL

Liberty County has the 58th longest season of 67 FL counties, at 303 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 67.4°F.

• Madison County: February 14 to December 15 (304 days, 0 WNV)
• Calhoun County: February 15 to December 15 (303 days, 0 WNV)
• Taylor County: February 16 to December 14 (301 days, 2 WNV)
• Lafayette County: February 17 to December 13 (299 days, 1 WNV)

West Nile in Liberty County

CDC ArboNET lists no human West Nile cases for Liberty County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.

Background: when the season starts across the US; how the dates are worked out.