Mosquito season in Benton County, MO: when it starts and ends
Mosquito months in Benton County
In a normal year mosquito season in Benton County, MO starts around March 30 and ends around November 4, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Benton County, and when
- Start tipping out standing water weekly by March 16.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 4.
- No West Nile cases since 2016, so bites in Benton County are a nuisance; check window screens.
Benton County against the rest of MO
Benton County has the 28th longest season of 115 MO counties, at 219 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 56.1°F.
- Ste. Genevieve County: March 29 to November 3 (219 days, 0 WNV)
- Texas County: March 29 to November 3 (219 days, 1 WNV)
- Greene County: March 30 to November 4 (219 days, 8 WNV)
- Cole County: March 29 to November 3 (218 days, 0 WNV)
West Nile in Benton County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Benton County (0 neuroinvasive) across 1 year. The worst was 2007 with 1; the latest was 2007.
Background: when mosquitoes go away for the winter; how the dates are worked out.