Mosquito season in Kenai Peninsula Borough, AK: when it starts and ends
Mosquito months in Kenai Peninsula Borough
In a normal year mosquito season in Kenai Peninsula Borough, AK starts around May 28 and ends around September 12, about 15 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Kenai Peninsula Borough, and when
- Start tipping out standing water weekly by May 14.
- Book any yard treatment for late May, ahead of the July peak.
- Repellent can go away after September 12.
- No West Nile cases since 2016, so bites in Kenai Peninsula Borough are a nuisance; check window screens.
Kenai Peninsula Borough against the rest of AK
Kenai Peninsula Borough has the 8th longest season of 26 AK counties, at 107 days against 142 in Ketchikan Gateway Borough and 48 in Nome Census Area. Its mean temperature is 37.4°F.
- Haines Borough: May 18 to September 15 (120 days, 0 WNV)
- Sitka City and Borough: June 1 to September 24 (115 days, 0 WNV)
- Chugach Census Area: May 31 to September 14 (107 days, 0 WNV)
- Fairbanks North Star Borough: May 20 to August 29 (101 days, 0 WNV)
West Nile in Kenai Peninsula Borough
CDC ArboNET lists no human West Nile cases for Kenai Peninsula Borough from 1999 to 2025.
More: how the dates are worked out · when mosquitoes go away for the winter.