Mosquito season in Waushara County, WI: when it starts and ends
Mosquito months in Waushara County
In a normal year mosquito season in Waushara County, WI starts around April 30 and ends around October 10, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Waushara County, and when
- Start tipping out standing water weekly by April 16.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 10.
- No West Nile cases since 2016, so bites in Waushara County are a nuisance; check window screens.
Waushara County against the rest of WI
Waushara County has the 32nd longest season of 72 WI counties, at 163 days against 180 in La Crosse County and 139 in Rusk County. Its mean temperature is 44.8°F.
- Eau Claire County: April 28 to October 8 (163 days, 3 WNV)
- Polk County: April 29 to October 9 (163 days, 0 WNV)
- Monroe County: April 29 to October 8 (162 days, 2 WNV)
- Chippewa County: April 30 to October 9 (162 days, 2 WNV)
West Nile in Waushara County
CDC ArboNET lists no human West Nile cases for Waushara County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 8 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.