Mosquito season in Lamoille County, VT: when it starts and ends
Mosquito months in Lamoille County
In a normal year mosquito season in Lamoille County, VT starts around May 9 and ends around October 3, about 21 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lamoille County, and when
- Start tipping out standing water weekly by April 25.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 3.
- No West Nile cases since 2016, so bites in Lamoille County are a nuisance; check window screens.
Lamoille County against the rest of VT
Lamoille County has the 11th longest season of 14 VT counties, at 147 days against 171 in Chittenden County and 144 in Orleans County. Its mean temperature is 41.7°F.
- Windham County: May 6 to October 7 (154 days, 0 WNV)
- Washington County: May 5 to October 6 (153 days, 0 WNV)
- Orange County: May 9 to October 2 (146 days, 0 WNV)
- Essex County: May 10 to October 1 (144 days, 0 WNV)
West Nile in Lamoille County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Lamoille County (0 neuroinvasive) across 1 year. The worst was 2013 with 1; the latest was 2013.
More: how the dates are worked out · when the season starts across the US.