Mosquito season in Baraga County, MI: when it starts and ends
Mosquito months in Baraga County
In a normal year mosquito season in Baraga County, MI starts around May 14 and ends around September 29, about 20 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Baraga County, and when
- Start tipping out standing water weekly by April 30.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after September 29.
- No West Nile cases since 2016, so bites in Baraga County are a nuisance; check window screens.
Baraga County against the rest of MI
Baraga County has the 81st longest season of 83 MI counties, at 138 days against 189 in Allegan County and 124 in Iron County. Its mean temperature is 39.9°F.
- Keweenaw County: May 16 to October 2 (139 days, 1 WNV)
- Alger County: May 18 to October 4 (139 days, 0 WNV)
- Houghton County: May 17 to September 30 (137 days, 0 WNV)
- Iron County: May 24 to September 25 (124 days, 0 WNV)
West Nile in Baraga County
CDC ArboNET lists no human West Nile cases for Baraga County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 7 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.