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

Mosquito months in Madison County

In a normal year mosquito season in Madison County, AL starts around March 10 and ends around November 20, about 36 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 Madison County, and when

• Start tipping out standing water weekly by February 24.
• Book any yard treatment for early March, ahead of the July peak.
• Repellent can go away after November 20.
• 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to September, and check AL spray notices.

Madison County against the rest of AL

Madison County has the 40th longest season of 67 AL counties, at 255 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 61.4°F.

• Elmore County: March 10 to November 21 (256 days, 6 WNV)
• Macon County: March 10 to November 21 (256 days, 0 WNV)
• Washington County: March 10 to November 20 (255 days, 1 WNV)
• Russell County: March 11 to November 20 (254 days, 0 WNV)

West Nile in Madison County

From 1999 to 2025, CDC ArboNET counted 14 human West Nile cases in Madison County (10 neuroinvasive) across 10 years. The worst was 2024 with 4; the latest was 2025.

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