Mosquito season in Matanuska-Susitna Borough, AK: when it starts and ends
Mosquito months in Matanuska-Susitna Borough
In a normal year mosquito season in Matanuska-Susitna Borough, AK starts around June 2 and ends around August 28, about 12 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Matanuska-Susitna Borough, and when
- Start tipping out standing water weekly by May 19.
- Book any yard treatment for early June, ahead of the July peak.
- Repellent can go away after August 28.
- No West Nile cases since 2016, so bites in Matanuska-Susitna Borough are a nuisance; check window screens.
Matanuska-Susitna Borough against the rest of AK
Matanuska-Susitna Borough has the 16th longest season of 26 AK counties, at 86 days against 142 in Ketchikan Gateway Borough and 48 in Nome Census Area. Its mean temperature is 33.8°F.
- Yakutat City and Borough: June 8 to September 9 (93 days, 0 WNV)
- Yukon-Koyukuk Census Area: May 26 to August 24 (90 days, 0 WNV)
- Bethel Census Area: June 5 to August 31 (86 days, 0 WNV)
- Southeast Fairbanks Census Area: May 29 to August 22 (85 days, 0 WNV)
West Nile in Matanuska-Susitna Borough
CDC ArboNET lists no human West Nile cases for Matanuska-Susitna Borough from 1999 to 2025.
More: how the dates are worked out · when the season starts across the US.