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

Mosquito months in Santa Rosa County

In a normal year mosquito season in Santa Rosa County, FL starts around February 13 and ends around December 24, about 45 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 Santa Rosa County, and when

• Start tipping out standing water weekly by January 30.
• Book any yard treatment for mid February, ahead of the July peak.
• Repellent can go away after December 24.
• 4 West Nile cases since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.

Santa Rosa County against the rest of FL

Santa Rosa County has the 51st longest season of 67 FL counties, at 314 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 68.2°F.

• Jackson County: February 9 to December 22 (316 days, 0 WNV)
• Alachua County: February 12 to December 25 (316 days, 0 WNV)
• Walton County: February 12 to December 16 (307 days, 1 WNV)
• Baker County: February 17 to December 21 (307 days, 0 WNV)

West Nile in Santa Rosa County

From 1999 to 2025, CDC ArboNET counted 20 human West Nile cases in Santa Rosa County (12 neuroinvasive) across 7 years. The worst was 2003 with 10; the latest was 2024.

See how the dates are worked out, and reading the West Nile counts.