Mosquito season in Cumberland County, ME: when it starts and ends
Mosquito months in Cumberland County
In a normal year mosquito season in Cumberland County, ME starts around May 3 and ends around October 13, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cumberland 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 13.
- 4 West Nile cases since 2016 (last 2024): you should use repellent at dusk July, more so if over 60.
Cumberland County against the rest of ME
Cumberland County has the 4th longest season of 16 ME counties, at 163 days against 164 in Kennebec County and 133 in Franklin County. Its mean temperature is 46.3°F.
- Lincoln County: May 2 to October 13 (164 days, 0 WNV)
- Androscoggin County: May 2 to October 12 (163 days, 0 WNV)
- Knox County: May 8 to October 15 (160 days, 0 WNV)
- Washington County: May 6 to October 11 (158 days, 0 WNV)
West Nile in Cumberland County
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Cumberland County (4 neuroinvasive) across 5 years. The worst was 2018 with 2; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.