Mosquito season in DeKalb County, AL: when it starts and ends
Mosquito months in DeKalb County
In a normal year mosquito season in DeKalb County, AL starts around March 14 and ends around November 19, about 36 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in DeKalb County, and when
- Start tipping out standing water weekly by February 28.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 19.
- No West Nile cases since 2016, so bites in DeKalb County are a nuisance; check window screens.
DeKalb County against the rest of AL
DeKalb County has the 48th longest season of 67 AL counties, at 250 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 60.7°F.
- Lamar County: March 13 to November 19 (251 days, 0 WNV)
- Lee County: March 13 to November 18 (250 days, 1 WNV)
- Lauderdale County: March 12 to November 14 (247 days, 0 WNV)
- Walker County: March 14 to November 15 (246 days, 1 WNV)
West Nile in DeKalb County
CDC ArboNET lists no human West Nile cases for DeKalb County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.