Mosquito season in Cheboygan County, MI: when it starts and ends
Mosquito months in Cheboygan County
In a normal year mosquito season in Cheboygan County, MI starts around May 9 and ends around October 8, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cheboygan County, and when
- Start tipping out standing water weekly by April 25.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 8.
- No West Nile cases since 2016, so bites in Cheboygan County are a nuisance; check window screens.
Cheboygan County against the rest of MI
Cheboygan County has the 59th longest season of 83 MI counties, at 152 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 43.6°F.
- Roscommon County: May 4 to October 5 (154 days, 0 WNV)
- Presque Isle County: May 8 to October 8 (153 days, 1 WNV)
- Alpena County: May 10 to October 8 (151 days, 0 WNV)
- Montmorency County: May 8 to October 5 (150 days, 0 WNV)
West Nile in Cheboygan County
CDC ArboNET lists no human West Nile cases for Cheboygan County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.