Mosquito season in Dickinson County, MI: when it starts and ends
Mosquito months in Dickinson County
In a normal year mosquito season in Dickinson County, MI starts around May 11 and ends around October 3, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dickinson County, and when
- Start tipping out standing water weekly by April 27.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after October 3.
- No West Nile cases since 2016, so bites in Dickinson County are a nuisance; check window screens.
Dickinson County against the rest of MI
Dickinson County has the 71st longest season of 83 MI counties, at 145 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 41.7°F.
- Delta County: May 11 to October 5 (147 days, 1 WNV)
- Chippewa County: May 11 to October 3 (145 days, 0 WNV)
- Mackinac County: May 12 to October 3 (144 days, 0 WNV)
- Alcona County: May 17 to October 7 (143 days, 0 WNV)
West Nile in Dickinson County
CDC ArboNET lists no human West Nile cases for Dickinson County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 10 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.