The most pleasant months of the year for Houlton are June, August and July. In Houlton, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Houlton with an average high temperature of 82.9°, which ranks it as warmer than most places in Wisconsin. December is the snowiest month in Houlton with 10.1 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though it is still relatively mild compared to many other places.