Boston is well known for its unpredictable weather. It could be cold one day, and really warm the next. In addition to that, the first month of summer is usually a continuation of the spring season: a lot of rain and not-too-hot weather. Snow days are not very common at MassArt, though. Winter is usually cold, but it barely ever snows until mid-December. Spring in Boston tends to bring warn, rainy, and cold days one after another. Since students generally have classes and reviews until mid-May, everything is warm and blooming by the time everyone leaves for the summer break.
It really does take time to get used to the weather here. Arguably, winter and spring are the most beautiful seasons, but in order to fully appreciate and enjoy Boston's weather, one has to have both T-shirts and a warm jacket and a rain coat in their wardrobe.