Mosquito season in Crawford County, PA: when it starts and ends
Mosquito months in Crawford County
In a normal year mosquito season in Crawford County, PA starts around April 23 and ends around October 18, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Crawford County, and when
- Start tipping out standing water weekly by April 9.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 18.
- No West Nile cases since 2016, so bites in Crawford County are a nuisance; check window screens.
Crawford County against the rest of PA
Crawford County has the 42nd longest season of 67 PA counties, at 177 days against 222 in Philadelphia County and 154 in Clinton County. Its mean temperature is 48.4°F.
- Luzerne County: April 22 to October 17 (178 days, 4 WNV)
- Venango County: April 23 to October 18 (178 days, 1 WNV)
- Bradford County: April 24 to October 17 (176 days, 0 WNV)
- Clearfield County: April 23 to October 15 (175 days, 0 WNV)
West Nile in Crawford County
CDC ArboNET lists no human West Nile cases for Crawford County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 17 of those years.
Background: when the season starts across the US; how the dates are worked out.