Mosquito season in Emmet County, MI: when it starts and ends
Mosquito months in Emmet County
In a normal year mosquito season in Emmet County, MI starts around May 10 and ends around October 7, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Emmet County, and when
- Start tipping out standing water weekly by April 26.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 7.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk July, more so if over 60.
Emmet County against the rest of MI
Emmet County has the 63rd longest season of 83 MI counties, at 149 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 43.1°F.
- Montmorency County: May 8 to October 5 (150 days, 0 WNV)
- Ontonagon County: May 10 to October 7 (150 days, 1 WNV)
- Menominee County: May 10 to October 6 (149 days, 1 WNV)
- Crawford County: May 10 to October 5 (148 days, 0 WNV)
West Nile in Emmet County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Emmet County (2 neuroinvasive) across 2 years. The worst was 2025 with 2; the latest was 2025.
Background: when mosquitoes go away for the winter; how the dates are worked out.