Mosquito season in Kewaunee County, WI: when it starts and ends
Mosquito months in Kewaunee County
In a normal year mosquito season in Kewaunee County, WI starts around May 9 and ends around October 10, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Kewaunee County, and when
- Start tipping out standing water weekly by April 25.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 10.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk July, more so if over 60.
Kewaunee County against the rest of WI
Kewaunee County has the 55th longest season of 72 WI counties, at 154 days against 180 in La Crosse County and 139 in Rusk County. Its mean temperature is 44.2°F.
- Door County: May 9 to October 11 (155 days, 0 WNV)
- Menominee County: May 4 to October 5 (154 days, 0 WNV)
- Manitowoc County: May 11 to October 11 (153 days, 3 WNV)
- Taylor County: May 4 to October 3 (152 days, 0 WNV)
West Nile in Kewaunee County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Kewaunee County (2 neuroinvasive) across 2 years. The worst was 2023 with 1; the latest was 2023.
See how the dates are worked out, and when the season starts across the US.