Mosquito season in Allegany County, NY: when it starts and ends
Mosquito months in Allegany County
In a normal year mosquito season in Allegany County, NY starts around May 8 and ends around October 9, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Allegany County, and when
- Start tipping out standing water weekly by April 24.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 9.
- No West Nile cases since 2016, so bites in Allegany County are a nuisance; check window screens.
Allegany County against the rest of NY
Allegany County has the 56th longest season of 62 NY counties, at 154 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 45.5°F.
- Washington County: May 5 to October 7 (155 days, 1 WNV)
- Otsego County: May 6 to October 6 (154 days, 0 WNV)
- Greene County: May 7 to October 6 (151 days, 3 WNV)
- Herkimer County: May 8 to October 4 (149 days, 0 WNV)
West Nile in Allegany County
CDC ArboNET lists no human West Nile cases for Allegany County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.