Mosquito season in Rusk County, WI: when it starts and ends
Mosquito months in Rusk County
In a normal year mosquito season in Rusk County, WI starts around May 15 and ends around October 1, about 20 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Rusk County, and when
- Start tipping out standing water weekly by May 1.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after October 1.
- 1 West Nile case since 2016 (last 2025): you should use repellent at dusk July, more so if over 60.
Rusk County against the rest of WI
Rusk County has the 72nd longest season of 72 WI counties, at 139 days against 180 in La Crosse County and 139 in Rusk County. Its mean temperature is 41.5°F.
- Oneida County: May 13 to October 1 (141 days, 0 WNV)
- Vilas County: May 12 to September 29 (140 days, 1 WNV)
West Nile in Rusk County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Rusk County (1 neuroinvasive) across 4 years. The worst was 2025 with 1; the latest was 2025.
See how the dates are worked out, and when the season starts across the US.