Mosquito season in Chemung County, NY: when it starts and ends
Mosquito months in Chemung County
In a normal year mosquito season in Chemung County, NY starts around April 27 and ends around October 14, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chemung County, and when
- Start tipping out standing water weekly by April 13.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 14.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July to July, more so if over 60.
Chemung County against the rest of NY
Chemung County has the 27th longest season of 62 NY counties, at 170 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 47.5°F.
- Cayuga County: April 28 to October 16 (171 days, 0 WNV)
- Seneca County: April 28 to October 16 (171 days, 0 WNV)
- Schenectady County: April 26 to October 12 (169 days, 3 WNV)
- Montgomery County: April 27 to October 13 (169 days, 0 WNV)
West Nile in Chemung County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Chemung County (1 neuroinvasive) across 1 year. The worst was 2018 with 1; the latest was 2018.
See how the dates are worked out, and when mosquitoes go away for the winter.