Mosquito season in Nantucket County, MA: when it starts and ends
Mosquito months in Nantucket County
In a normal year mosquito season in Nantucket County, MA starts around May 1 and ends around November 2, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Nantucket County, and when
- Start tipping out standing water weekly by April 17.
- Book any yard treatment for early May, ahead of the August peak.
- Repellent can go away after November 2.
- No West Nile cases since 2016, so bites in Nantucket County are a nuisance; check window screens.
Nantucket County against the rest of MA
Nantucket County has the 4th longest season of 14 MA counties, at 185 days against 194 in Plymouth County and 163 in Berkshire County. Its mean temperature is 50.7°F.
- Suffolk County: April 19 to October 29 (193 days, 18 WNV)
- Norfolk County: April 15 to October 23 (191 days, 6 WNV)
- Bristol County: April 23 to October 24 (184 days, 8 WNV)
- Barnstable County: April 28 to October 29 (184 days, 7 WNV)
West Nile in Nantucket County
CDC ArboNET lists no human West Nile cases for Nantucket County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
Background: when the season starts across the US; how the dates are worked out.