Mosquito season in Windsor County, VT: when it starts and ends
Mosquito months in Windsor County
In a normal year mosquito season in Windsor County, VT starts around May 3 and ends around October 8, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Windsor County, and when
- Start tipping out standing water weekly by April 19.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 8.
- 2 West Nile cases since 2016 (last 2016): you should use repellent at dusk July, more so if over 60.
Windsor County against the rest of VT
Windsor County has the 5th longest season of 14 VT counties, at 158 days against 171 in Chittenden County and 144 in Orleans County. Its mean temperature is 44.6°F.
- Addison County: April 30 to October 11 (164 days, 1 WNV)
- Franklin County: May 4 to October 10 (159 days, 0 WNV)
- Rutland County: May 2 to October 5 (156 days, 0 WNV)
- Caledonia County: May 4 to October 6 (155 days, 0 WNV)
West Nile in Windsor County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Windsor County (2 neuroinvasive) across 1 year. The worst was 2016 with 2; the latest was 2016.
Background: when mosquitoes go away for the winter; how the dates are worked out.