Mosquito season in Haines Borough, AK: when it starts and ends
Mosquito months in Haines Borough
In a normal year mosquito season in Haines Borough, AK starts around May 18 and ends around September 15, about 17 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Haines Borough, and when
- Start tipping out standing water weekly by May 4.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after September 15.
- No West Nile cases since 2016, so bites in Haines Borough are a nuisance; check window screens.
Haines Borough against the rest of AK
Haines Borough has the 6th longest season of 26 AK counties, at 120 days against 142 in Ketchikan Gateway Borough and 48 in Nome Census Area. Its mean temperature is 40.2°F.
- Prince of Wales-Hyder Census Area: May 24 to September 26 (125 days, 0 WNV)
- Petersburg Borough: May 22 to September 20 (121 days, 0 WNV)
- Sitka City and Borough: June 1 to September 24 (115 days, 0 WNV)
- Kenai Peninsula Borough: May 28 to September 12 (107 days, 0 WNV)
West Nile in Haines Borough
CDC ArboNET lists no human West Nile cases for Haines Borough from 1999 to 2025.
Background: when mosquitoes go away for the winter; how the dates are worked out.