Mosquito season in Lapeer County, MI: when it starts and ends
Mosquito months in Lapeer County
In a normal year mosquito season in Lapeer County, MI starts around April 27 and ends around October 17, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lapeer County, and when
- Start tipping out standing water weekly by April 13.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 17.
- 2 West Nile cases since 2016 (last 2024): you should use repellent at dusk July to July, more so if over 60.
Lapeer County against the rest of MI
Lapeer County has the 23rd longest season of 83 MI counties, at 173 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 47.7°F.
- Ottawa County: April 27 to October 19 (174 days, 6 WNV)
- Kent County: April 27 to October 17 (173 days, 46 WNV)
- Shiawassee County: April 27 to October 16 (173 days, 1 WNV)
- Eaton County: April 26 to October 15 (172 days, 2 WNV)
West Nile in Lapeer County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Lapeer County (4 neuroinvasive) across 5 years. The worst was 2024 with 1; the latest was 2024.
More: how the dates are worked out · when the season starts across the US.