Mosquito season in Essex County, NY: when it starts and ends
Mosquito months in Essex County
In a normal year mosquito season in Essex County, NY starts around May 13 and ends around September 29, about 20 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Essex County, and when
- Start tipping out standing water weekly by April 29.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after September 29.
- No West Nile cases since 2016, so bites in Essex County are a nuisance; check window screens.
Essex County against the rest of NY
Essex County has the 61st longest season of 62 NY counties, at 139 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 40.5°F.
- Hamilton County: May 9 to October 3 (147 days, 0 WNV)
- Fulton County: May 10 to October 1 (145 days, 0 WNV)
- Franklin County: May 21 to September 23 (125 days, 1 WNV)
West Nile in Essex County
CDC ArboNET lists no human West Nile cases for Essex County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 4 of those years.
See how the dates are worked out, and when the season starts across the US.