Mosquito season in Yukon-Koyukuk Census Area, AK: when it starts and ends

Mosquito months in Yukon-Koyukuk Census Area

In a normal year mosquito season in Yukon-Koyukuk Census Area, AK starts around May 26 and ends around August 24, about 13 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 Yukon-Koyukuk Census Area, and when

• Start tipping out standing water weekly by May 12.
• Book any yard treatment for late May, ahead of the July peak.
• Repellent can go away after August 24.
• No West Nile cases since 2016, so bites in Yukon-Koyukuk Census Area are a nuisance; check window screens.

Yukon-Koyukuk Census Area against the rest of AK

Yukon-Koyukuk Census Area has the 15th longest season of 26 AK counties, at 90 days against 142 in Ketchikan Gateway Borough and 48 in Nome Census Area. Its mean temperature is 25.2°F.

• Hoonah-Angoon Census Area: June 3 to September 7 (95 days, 0 WNV)
• Yakutat City and Borough: June 8 to September 9 (93 days, 0 WNV)
• Matanuska-Susitna Borough: June 2 to August 28 (86 days, 0 WNV)
• Bethel Census Area: June 5 to August 31 (86 days, 0 WNV)

West Nile in Yukon-Koyukuk Census Area

CDC ArboNET lists no human West Nile cases for Yukon-Koyukuk Census Area from 1999 to 2025.

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