Mosquito season in Chautauqua County, NY: when it starts and ends
Mosquito months in Chautauqua County
In a normal year mosquito season in Chautauqua County, NY starts around April 23 and ends around October 23, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chautauqua 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 23.
- No West Nile cases since 2016, so bites in Chautauqua County are a nuisance; check window screens.
Chautauqua County against the rest of NY
Chautauqua County has the 13th longest season of 62 NY counties, at 183 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 49.4°F.
- Orange County: April 20 to October 20 (183 days, 0 WNV)
- Ulster County: April 20 to October 20 (183 days, 2 WNV)
- Orleans County: April 24 to October 21 (180 days, 1 WNV)
- Columbia County: April 22 to October 18 (179 days, 2 WNV)
West Nile in Chautauqua County
CDC ArboNET lists no human West Nile cases for Chautauqua County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 17 of those years.
More: how the dates are worked out · when the season starts across the US.