Mosquito season in Otsego County, NY: when it starts and ends
Mosquito months in Otsego County
In a normal year mosquito season in Otsego County, NY starts around May 6 and ends around October 6, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Otsego County, and when
- Start tipping out standing water weekly by April 22.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 6.
- No West Nile cases since 2016, so bites in Otsego County are a nuisance; check window screens.
Otsego County against the rest of NY
Otsego County has the 55th longest season of 62 NY counties, at 154 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 43.8°F.
- Lewis County: May 4 to October 7 (156 days, 0 WNV)
- Washington County: May 5 to October 7 (155 days, 1 WNV)
- Allegany County: May 8 to October 9 (154 days, 0 WNV)
- Greene County: May 7 to October 6 (151 days, 3 WNV)
West Nile in Otsego County
CDC ArboNET lists no human West Nile cases for Otsego County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 7 of those years.
More: how the dates are worked out · when mosquitoes go away for the winter.