Mosquito season in Daviess County, MO: when it starts and ends
Mosquito months in Daviess County
In a normal year mosquito season in Daviess County, MO starts around April 10 and ends around October 24, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Daviess County, and when
- Start tipping out standing water weekly by March 27.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 24.
- No West Nile cases since 2016, so bites in Daviess County are a nuisance; check window screens.
Daviess County against the rest of MO
Daviess County has the 100th longest season of 115 MO counties, at 197 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 51.7°F.
- Shelby County: April 11 to October 27 (199 days, 0 WNV)
- Gentry County: April 11 to October 25 (198 days, 0 WNV)
- Harrison County: April 10 to October 25 (197 days, 1 WNV)
- Clark County: April 11 to October 24 (196 days, 0 WNV)
West Nile in Daviess County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Daviess County (3 neuroinvasive) across 3 years. The worst was 2014 with 1; the latest was 2014.
See how the dates are worked out, and when the season starts across the US.