The most pleasant months of the year for the 99903 zip code are August, July and June. In the 99903 zip code, there are 0 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for the 99903 zip code with an average high temperature of 64.9°, which ranks it as about average compared to other places in Alaska. January is the snowiest month in the 99903 zip code with 6.4 inches of snow, and 6 months of the year have significant snowfall. Days with noticeable humidity are rare throughout the year.