Mosquito season in Fulton County, PA: when it starts and ends
Mosquito months in Fulton County
In a normal year mosquito season in Fulton County, PA starts around April 12 and ends around October 27, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Fulton County, and when
- Start tipping out standing water weekly by March 29.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 27.
- No West Nile cases since 2016, so bites in Fulton County are a nuisance; check window screens.
Fulton County against the rest of PA
Fulton County has the 11th longest season of 67 PA counties, at 198 days against 222 in Philadelphia County and 154 in Clinton County. Its mean temperature is 52.8°F.
- Allegheny County: April 12 to October 27 (198 days, 23 WNV)
- Chester County: April 12 to October 27 (198 days, 23 WNV)
- Montgomery County: April 12 to October 27 (198 days, 41 WNV)
- Lebanon County: April 12 to October 26 (197 days, 14 WNV)
West Nile in Fulton County
CDC ArboNET lists no human West Nile cases for Fulton County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 14 of those years.
See how the dates are worked out, and when the season starts across the US.