Mosquito season in Burnett County, WI: when it starts and ends
Mosquito months in Burnett County
In a normal year mosquito season in Burnett County, WI starts around May 1 and ends around October 6, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Burnett 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 6.
- No West Nile cases since 2016, so bites in Burnett County are a nuisance; check window screens.
Burnett County against the rest of WI
Burnett County has the 44th longest season of 72 WI counties, at 158 days against 180 in La Crosse County and 139 in Rusk County. Its mean temperature is 43°F.
- Portage County: May 1 to October 8 (160 days, 1 WNV)
- Ozaukee County: May 6 to October 12 (160 days, 2 WNV)
- St. Croix County: May 2 to October 7 (158 days, 4 WNV)
- Barron County: May 2 to October 6 (157 days, 2 WNV)
West Nile in Burnett County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Burnett County (0 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.
More: how the dates are worked out · when mosquitoes go away for the winter.