Mosquito season in Chugach Census Area, AK: when it starts and ends
Mosquito months in Chugach Census Area
In a normal year mosquito season in Chugach Census Area, AK starts around May 31 and ends around September 14, about 15 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chugach Census Area, and when
- Start tipping out standing water weekly by May 17.
- Book any yard treatment for late May, ahead of the July peak.
- Repellent can go away after September 14.
- No West Nile cases since 2016, so bites in Chugach Census Area are a nuisance; check window screens.
Chugach Census Area against the rest of AK
Chugach Census Area has the 9th 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 42.1°F.
- 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)
- Fairbanks North Star Borough: May 20 to August 29 (101 days, 0 WNV)
- Juneau City and Borough: June 1 to September 6 (98 days, 0 WNV)
West Nile in Chugach Census Area
CDC ArboNET lists no human West Nile cases for Chugach Census Area from 1999 to 2025.
See how the dates are worked out, and when mosquitoes go away for the winter.