Mosquito season in Moniteau County, MO: when it starts and ends
Mosquito months in Moniteau County
In a normal year mosquito season in Moniteau County, MO starts around April 1 and ends around November 1, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Moniteau County, and when
- Start tipping out standing water weekly by March 18.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 1.
- No West Nile cases since 2016, so bites in Moniteau County are a nuisance; check window screens.
Moniteau County against the rest of MO
Moniteau County has the 46th longest season of 115 MO counties, at 214 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 54.9°F.
- Webster County: April 1 to November 2 (215 days, 1 WNV)
- Bollinger County: April 1 to November 1 (214 days, 0 WNV)
- Polk County: April 1 to November 1 (214 days, 0 WNV)
- St. Francois County: April 1 to November 1 (214 days, 1 WNV)
West Nile in Moniteau County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Moniteau County (1 neuroinvasive) across 2 years. The worst was 2004 with 1; the latest was 2004.
More: how the dates are worked out · when mosquitoes go away for the winter.