Mosquito season in Dunklin County, MO: when it starts and ends
Mosquito months in Dunklin County
In a normal year mosquito season in Dunklin County, MO starts around March 19 and ends around November 13, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dunklin County, and when
- Start tipping out standing water weekly by March 5.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 13.
- No West Nile cases since 2016, so bites in Dunklin County are a nuisance; check window screens.
Dunklin County against the rest of MO
Dunklin County has the 2nd longest season of 115 MO counties, at 239 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 59.7°F.
- Pemiscot County: March 16 to November 13 (242 days, 0 WNV)
- New Madrid County: March 19 to November 10 (236 days, 1 WNV)
- Butler County: March 20 to November 9 (234 days, 3 WNV)
West Nile in Dunklin County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Dunklin County (3 neuroinvasive) across 3 years. The worst was 2014 with 1; the latest was 2014.
Background: when the season starts across the US; how the dates are worked out.