Mosquito season in Alcona County, MI: when it starts and ends
Mosquito months in Alcona County
In a normal year mosquito season in Alcona County, MI starts around May 17 and ends around October 7, about 20 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Alcona County, and when
- Start tipping out standing water weekly by May 3.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after October 7.
- No West Nile cases since 2016, so bites in Alcona County are a nuisance; check window screens.
Alcona County against the rest of MI
Alcona County has the 73rd longest season of 83 MI counties, at 143 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 42.8°F.
- Dickinson County: May 11 to October 3 (145 days, 0 WNV)
- Mackinac County: May 12 to October 3 (144 days, 0 WNV)
- Marquette County: May 15 to October 4 (142 days, 1 WNV)
- Lake County: May 18 to October 7 (142 days, 0 WNV)
West Nile in Alcona County
CDC ArboNET lists no human West Nile cases for Alcona County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.