Mosquito season in Carbon County, PA: when it starts and ends
Mosquito months in Carbon County
In a normal year mosquito season in Carbon County, PA starts around April 25 and ends around October 14, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Carbon County, and when
- Start tipping out standing water weekly by April 11.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 14.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July, more so if over 60.
Carbon County against the rest of PA
Carbon County has the 49th longest season of 67 PA counties, at 172 days against 222 in Philadelphia County and 154 in Clinton County. Its mean temperature is 47.6°F.
- Monroe County: April 24 to October 14 (173 days, 3 WNV)
- Jefferson County: April 25 to October 14 (173 days, 0 WNV)
- Cameron County: April 27 to October 14 (170 days, 0 WNV)
- Clarion County: April 29 to October 14 (168 days, 0 WNV)
West Nile in Carbon County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Carbon County (2 neuroinvasive) across 2 years. The worst was 2018 with 1; the latest was 2018.
See how the dates are worked out, and when mosquitoes go away for the winter.