Mosquito season in Cayuga County, NY: when it starts and ends
Mosquito months in Cayuga County
In a normal year mosquito season in Cayuga County, NY starts around April 28 and ends around October 16, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cayuga County, and when
- Start tipping out standing water weekly by April 14.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 16.
- No West Nile cases since 2016, so bites in Cayuga County are a nuisance; check window screens.
Cayuga County against the rest of NY
Cayuga County has the 25th longest season of 62 NY counties, at 171 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 47.4°F.
- Livingston County: April 27 to October 17 (173 days, 2 WNV)
- Onondaga County: April 27 to October 17 (173 days, 10 WNV)
- Seneca County: April 28 to October 16 (171 days, 0 WNV)
- Chemung County: April 27 to October 14 (170 days, 1 WNV)
West Nile in Cayuga County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Cayuga County (0 neuroinvasive) across 1 year. The worst was 2013 with 1; the latest was 2013.
See how the dates are worked out, and when the season starts across the US.