Mosquito season in Manistee County, MI: when it starts and ends
Mosquito months in Manistee County
In a normal year mosquito season in Manistee County, MI starts around April 30 and ends around October 17, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Manistee County, and when
- Start tipping out standing water weekly by April 16.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 17.
- No West Nile cases since 2016, so bites in Manistee County are a nuisance; check window screens.
Manistee County against the rest of MI
Manistee County has the 34th longest season of 83 MI counties, at 170 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 47.4°F.
- Gratiot County: April 27 to October 14 (170 days, 1 WNV)
- Ionia County: April 27 to October 13 (170 days, 2 WNV)
- Tuscola County: April 29 to October 14 (168 days, 4 WNV)
- Sanilac County: May 2 to October 14 (165 days, 4 WNV)
West Nile in Manistee County
CDC ArboNET lists no human West Nile cases for Manistee County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 5 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.