Temperature for September
In Adak Island, AK during September the average high temperature is 52.6°F. The hottest day on record was September 6, 1947 when the temperature recorded was 70.3°F.
Precipitation for September
In September the average monthly rainfall in Adak Island, AK is 1.81 inches with rain usually falling on between 20 and 21 days. 1965 was the driest September with only 0.00 inches of rain falling, and 1995 was the wettest September with 8.69 inches of rain. The wettest single day in September was 17 September 1987 when 5.00 inches of rain fell.
In September it usually snows on between 0 and 1 days. In September there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in September.