Mosquito season in Dade County, MO: when it starts and ends
Mosquito months in Dade County
In a normal year mosquito season in Dade County, MO starts around March 31 and ends around November 1, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dade County, and when
- Start tipping out standing water weekly by March 17.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 1.
- No West Nile cases since 2016, so bites in Dade County are a nuisance; check window screens.
Dade County against the rest of MO
Dade County has the 40th longest season of 115 MO counties, at 215 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 56.5°F.
- Ozark County: April 2 to November 4 (216 days, 0 WNV)
- Barry County: April 3 to November 5 (216 days, 0 WNV)
- McDonald County: March 31 to November 1 (215 days, 0 WNV)
- Osage County: March 31 to November 1 (215 days, 0 WNV)
West Nile in Dade County
CDC ArboNET lists no human West Nile cases for Dade County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.