The most pleasant months of the year for Stony Brook University are June, September and August. In Stony Brook University, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Stony Brook University with an average high temperature of 83.2°, which ranks it as warmer than most places in New York. February is the snowiest month in Stony Brook University with 8.2 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.