Mosquito season in Newaygo County, MI: when it starts and ends
Mosquito months in Newaygo County
In a normal year mosquito season in Newaygo County, MI starts around May 1 and ends around October 11, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Newaygo County, and when
- Start tipping out standing water weekly by April 17.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 11.
- 1 West Nile case since 2016 (last 2021): you should use repellent at dusk July, more so if over 60.
Newaygo County against the rest of MI
Newaygo County has the 43rd longest season of 83 MI counties, at 162 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 45.9°F.
- Muskegon County: May 5 to October 15 (163 days, 2 WNV)
- Huron County: May 6 to October 16 (163 days, 0 WNV)
- Gladwin County: May 2 to October 10 (162 days, 0 WNV)
- Mecosta County: May 1 to October 9 (161 days, 0 WNV)
West Nile in Newaygo County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Newaygo County (3 neuroinvasive) across 2 years. The worst was 2002 with 2; the latest was 2021.
More: how the dates are worked out · when mosquitoes go away for the winter.