Mosquito season in Cambria County, PA: when it starts and ends
Mosquito months in Cambria County
In a normal year mosquito season in Cambria County, PA starts around May 4 and ends around October 12, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cambria 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 12.
- 4 West Nile cases since 2016 (last 2025): you should use repellent at dusk July, more so if over 60.
Cambria County against the rest of PA
Cambria County has the 58th longest season of 67 PA counties, at 161 days against 222 in Philadelphia County and 154 in Clinton County. Its mean temperature is 46.9°F.
- Forest County: May 2 to October 13 (164 days, 0 WNV)
- Mercer County: May 3 to October 13 (163 days, 0 WNV)
- Elk County: May 3 to October 10 (160 days, 0 WNV)
- McKean County: May 3 to October 10 (160 days, 0 WNV)
West Nile in Cambria County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Cambria County (3 neuroinvasive) across 3 years. The worst was 2018 with 2; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.