Mosquito season in Midland County, MI: when it starts and ends
Mosquito months in Midland County
In a normal year mosquito season in Midland County, MI starts around April 27 and ends around October 15, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Midland 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 15.
- No West Nile cases since 2016, so bites in Midland County are a nuisance; check window screens.
Midland County against the rest of MI
Midland County has the 30th longest season of 83 MI counties, at 171 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 47.1°F.
- Genesee County: April 27 to October 15 (171 days, 9 WNV)
- Isabella County: April 27 to October 15 (171 days, 2 WNV)
- Bay County: April 28 to October 16 (171 days, 4 WNV)
- Gratiot County: April 27 to October 14 (170 days, 1 WNV)
West Nile in Midland County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Midland County (1 neuroinvasive) across 1 year. The worst was 2013 with 1; the latest was 2013.
Background: when the season starts across the US; how the dates are worked out.