Mosquito season in Steuben County, NY: when it starts and ends
Mosquito months in Steuben County
In a normal year mosquito season in Steuben County, NY starts around May 1 and ends around October 11, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Steuben County, and when
- Start tipping out standing water weekly by April 17.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 11.
- 1 West Nile case since 2016 (last 2021): you should use repellent at dusk July, more so if over 60.
Steuben County against the rest of NY
Steuben County has the 41st longest season of 62 NY counties, at 163 days against 218 in New York County and 125 in Franklin County. Its mean temperature is 46.1°F.
- Warren County: April 30 to October 10 (163 days, 0 WNV)
- Chenango County: May 1 to October 11 (163 days, 0 WNV)
- Clinton County: May 1 to October 10 (162 days, 2 WNV)
- Jefferson County: May 2 to October 11 (162 days, 1 WNV)
West Nile in Steuben County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Steuben County (1 neuroinvasive) across 1 year. The worst was 2021 with 1; the latest was 2021.
Background: when the season starts across the US; how the dates are worked out.