Mosquito season in Sumter County, AL: when it starts and ends
Mosquito months in Sumter County
In a normal year mosquito season in Sumter County, AL starts around March 4 and ends around November 21, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Sumter County, and when
- Start tipping out standing water weekly by February 18.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 21.
- 3 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.
Sumter County against the rest of AL
Sumter County has the 26th longest season of 67 AL counties, at 262 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 64°F.
- Limestone County: March 6 to November 24 (263 days, 4 WNV)
- Perry County: March 3 to November 20 (262 days, 1 WNV)
- Fayette County: March 5 to November 22 (262 days, 1 WNV)
- Jefferson County: March 7 to November 24 (262 days, 34 WNV)
West Nile in Sumter County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Sumter County (2 neuroinvasive) across 3 years. The worst was 2025 with 1; the latest was 2025.
More: how the dates are worked out · when the season starts across the US.