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

Mosquito months in Marengo County

In a normal year mosquito season in Marengo County, AL starts around March 2 and ends around November 26, about 38 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 Marengo County, and when

• Start tipping out standing water weekly by February 16.
• Book any yard treatment for early March, ahead of the July peak.
• Repellent can go away after November 26.
• No West Nile cases since 2016, so bites in Marengo County are a nuisance; check window screens.

Marengo County against the rest of AL

Marengo County has the 17th longest season of 67 AL counties, at 269 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 64.6°F.

• Lowndes County: February 27 to November 25 (271 days, 2 WNV)
• Hale County: March 1 to November 25 (269 days, 0 WNV)
• Tuscaloosa County: March 3 to November 25 (267 days, 11 WNV)
• Greene County: March 2 to November 22 (265 days, 0 WNV)

West Nile in Marengo County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Marengo County (1 neuroinvasive) across 2 years. The worst was 2002 with 2; the latest was 2012.

See how the dates are worked out, and when mosquitoes go away for the winter.