The most pleasant months of the year for the 03604 zip code are June, August and July. In the 03604 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for the 03604 zip code with an average high temperature of 81.5°, which ranks it as warmer than most places in New Hampshire. January is the snowiest month in the 03604 zip code with 16.5 inches of snow, and 6 months of the year have significant snowfall. There are few days during the summer when the humidity becomes unpleasant.