Mosquito season in Baldwin County, AL: when it starts and ends

Mosquito months in Baldwin County

In a normal year mosquito season in Baldwin County, AL starts around February 21 and ends around January 14, about 47 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 Baldwin County, and when

• Start tipping out standing water weekly by February 7.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after January 14.
• 15 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check AL spray notices.

Baldwin County against the rest of AL

Baldwin County has the 2nd longest season of 67 AL counties, at 327 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 66.2°F.

• Montgomery County: February 17 to January 13 (330 days, 27 WNV)
• Henry County: February 19 to January 7 (322 days, 1 WNV)
• Coffee County: February 22 to January 8 (320 days, 1 WNV)

West Nile in Baldwin County

From 1999 to 2025, CDC ArboNET counted 32 human West Nile cases in Baldwin County (21 neuroinvasive) across 13 years. The worst was 2003 with 8; the latest was 2025.

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