Mosquito season in Kennebec County, ME: when it starts and ends

Mosquito months in Kennebec County

In a normal year mosquito season in Kennebec County, ME starts around May 2 and ends around October 13, about 23 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Kennebec County, and when

• Start tipping out standing water weekly by April 18.
• Book any yard treatment for early May, ahead of the July peak.
• Repellent can go away after October 13.
• No West Nile cases since 2016, so bites in Kennebec County are a nuisance; check window screens.

Kennebec County against the rest of ME

Kennebec County has the 1st longest season of 16 ME counties, at 164 days against 164 in Kennebec County and 133 in Franklin County. Its mean temperature is 45.9°F.

• Lincoln County: May 2 to October 13 (164 days, 0 WNV)
• Androscoggin County: May 2 to October 12 (163 days, 0 WNV)

West Nile in Kennebec County

CDC ArboNET lists no human West Nile cases for Kennebec County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.

See how the dates are worked out, and when the season starts across the US.