Mosquito season in Macon County, MO: when it starts and ends
Mosquito months in Macon County
In a normal year mosquito season in Macon County, MO starts around April 5 and ends around October 29, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Macon County, and when
- Start tipping out standing water weekly by March 22.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 29.
- No West Nile cases since 2016, so bites in Macon County are a nuisance; check window screens.
Macon County against the rest of MO
Macon County has the 78th longest season of 115 MO counties, at 207 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 53.7°F.
- Pettis County: April 5 to October 30 (208 days, 0 WNV)
- Callaway County: April 4 to October 28 (207 days, 0 WNV)
- Pike County: April 5 to October 29 (207 days, 0 WNV)
- Lincoln County: April 6 to October 29 (206 days, 2 WNV)
West Nile in Macon County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Macon County (1 neuroinvasive) across 1 year. The worst was 2005 with 1; the latest was 2005.
Background: when mosquitoes go away for the winter; how the dates are worked out.