Mosquito season in York County, ME: when it starts and ends
Mosquito months in York County
In a normal year mosquito season in York County, ME starts around May 3 and ends around October 7, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in York 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 7.
- No West Nile cases since 2016, so bites in York County are a nuisance; check window screens.
York County against the rest of ME
York County has the 7th longest season of 16 ME counties, at 157 days against 164 in Kennebec County and 133 in Franklin County. Its mean temperature is 45.7°F.
- Knox County: May 8 to October 15 (160 days, 0 WNV)
- Washington County: May 6 to October 11 (158 days, 0 WNV)
- Sagadahoc County: May 8 to October 11 (156 days, 0 WNV)
- Hancock County: May 7 to October 10 (155 days, 1 WNV)
West Nile in York County
CDC ArboNET lists no human West Nile cases for York County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 14 of those years.
More: how the dates are worked out · when the season starts across the US.