Snow in April and shorts in November—these two events are not all that uncommon of the typical New England weather in Waltham. The area easily sees four very distinct seasons within the school year but with random days of other seasonal weather interspersed. You could be in a winter coat one day and shorts the next. Upon arrival to school in September, shorts and T-shirts are still common, but the change from late summer to fall can occur in an instant. The fall is a beautiful and comfortable time of year; with a slight autumn chill in the air and beautiful fall foliage, the campus really comes alive. Winter is typically brutal, with a few months (usually December–March) of freezing cold temperatures and an always decent amount of snow, meaning winter clothes are a definite necessity. But don't forget shorts or possibly a bikini, there is plenty of sun in the fall and late spring to lounge on the Greenspace and work on that tan.
It is most certainly important to be prepared for all types of weather, from heat to rain to humidity to snow and everything in between. It’s typical New England weather—it can change by the hour.