Mosquito season in Cattaraugus County, NY: when it starts and ends
Mosquito months in Cattaraugus County
In a normal year mosquito season in Cattaraugus County, NY 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 Cattaraugus 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.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July, more so if over 60.
Cattaraugus County against the rest of NY
Cattaraugus County has the 48th longest season of 62 NY counties, at 160 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 45.3°F.
- Sullivan County: May 2 to October 10 (161 days, 2 WNV)
- St. Lawrence County: May 2 to October 9 (160 days, 3 WNV)
- Madison County: May 3 to October 9 (159 days, 0 WNV)
- Cortland County: May 4 to October 9 (158 days, 0 WNV)
West Nile in Cattaraugus County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Cattaraugus County (1 neuroinvasive) across 3 years. The worst was 2018 with 1; the latest was 2018.
More: how the dates are worked out · when the season starts across the US.