Mosquito season in Broome County, NY: when it starts and ends
Mosquito months in Broome County
In a normal year mosquito season in Broome County, NY starts around April 28 and ends around October 14, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Broome 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 14.
- 3 West Nile cases since 2016 (last 2023): you should use repellent at dusk July, more so if over 60.
Broome County against the rest of NY
Broome County has the 30th longest season of 62 NY counties, at 169 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 47°F.
- Schenectady County: April 26 to October 12 (169 days, 3 WNV)
- Montgomery County: April 27 to October 13 (169 days, 0 WNV)
- Oneida County: April 28 to October 14 (169 days, 1 WNV)
- Erie County: April 30 to October 15 (169 days, 12 WNV)
West Nile in Broome County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Broome County (7 neuroinvasive) across 4 years. The worst was 2002 with 7; the latest was 2023.
Background: when the season starts across the US; how the dates are worked out.