Mosquito season in Wayne County, PA: when it starts and ends
Mosquito months in Wayne County
In a normal year mosquito season in Wayne County, PA starts around May 3 and ends around October 10, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Wayne County, and when
- Start tipping out standing water weekly by April 19.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 10.
- No West Nile cases since 2016, so bites in Wayne County are a nuisance; check window screens.
Wayne County against the rest of PA
Wayne County has the 61st longest season of 67 PA counties, at 160 days against 222 in Philadelphia County and 154 in Clinton County. Its mean temperature is 45.9°F.
- Elk County: May 3 to October 10 (160 days, 0 WNV)
- McKean County: May 3 to October 10 (160 days, 0 WNV)
- Susquehanna County: May 3 to October 9 (159 days, 0 WNV)
- Sullivan County: May 2 to October 8 (158 days, 0 WNV)
West Nile in Wayne County
CDC ArboNET lists no human West Nile cases for Wayne County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.
Background: when the season starts across the US; how the dates are worked out.