An overcoat or winter jacket and sweaters will be necessary during the cooler weather from November to March. Spring and Autumn are mild and pleasant, requiring only light jackets or sweaters. As for the climate, four distinct seasons occur in this temperate zone. Summer is hot and humid. For people not used to humidity, the summer, June through September, can be uncomfortable.
Winter is cold and windy.
Fall and Spring are delightful. The rainy season in Tokyo starts in June and continues through mid-July. Typhoons can strike in September and October. Teaching assignments usually start the week after arrival. LCs must be available from 8 AM to 9 PM Monday through Friday for teaching and other assignments.