Mosquito season in Antrim County, MI: when it starts and ends
Mosquito months in Antrim County
In a normal year mosquito season in Antrim County, MI starts around May 8 and ends around October 11, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Antrim County, and when
- Start tipping out standing water weekly by April 24.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 11.
- No West Nile cases since 2016, so bites in Antrim County are a nuisance; check window screens.
Antrim County against the rest of MI
Antrim County has the 52nd longest season of 83 MI counties, at 156 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 45.3°F.
- Montcalm County: May 4 to October 7 (156 days, 3 WNV)
- Osceola County: May 5 to October 7 (156 days, 0 WNV)
- Ogemaw County: May 5 to October 7 (155 days, 0 WNV)
- Wexford County: May 5 to October 7 (155 days, 0 WNV)
West Nile in Antrim County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Antrim County (0 neuroinvasive) across 1 year. The worst was 2006 with 1; the latest was 2006.
See how the dates are worked out, and when the season starts across the US.