Mosquito season in Taylor County, WI: when it starts and ends

Mosquito months in Taylor County

In a normal year mosquito season in Taylor County, WI starts around May 4 and ends around October 3, about 22 weeks.

What to do in Taylor County, and when

Start tipping out standing water weekly by April 20.
Book any yard treatment for early May, ahead of the July peak.
Repellent can go away after October 3.
No West Nile cases since 2016, so bites in Taylor County are a nuisance; check window screens.

Taylor County against the rest of WI

Taylor County has the 57th longest season of 72 WI counties, at 152 days against 180 in La Crosse County and 139 in Rusk County. Its mean temperature is 41.9°F.

Kewaunee County: May 9 to October 10 (154 days, 2 WNV)
Manitowoc County: May 11 to October 11 (153 days, 3 WNV)
Juneau County: May 5 to October 3 (151 days, 3 WNV)
Douglas County: May 7 to October 4 (151 days, 3 WNV)

West Nile in Taylor County

CDC ArboNET lists no human West Nile cases for Taylor County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.

See how the dates are worked out, and when the season starts across the US.