On an average, Siliguri gets 3340 mm per year. Winters are mostly dry, with the summers being rainy. About 80% of the annual rainfall is felt between June to September, this period is known as monsoons or rainy season in the season cycle. Heavy showers are often felt in May, June, July, August and September. July is the wettest month (804 mm) and January is the driest month (12 mm). The average rainy days in July is 27 and for December and January it is 1. The humidity in air is high throughout the year.