05/02/2018
Traditionally divided into six seasons: Grisma (summer), Barsa (rainy), Sarat (autumn), Hemanta (late autumn), Shhit (winter) and Basanta (spring). Each season comprises two months, but some seasons flow into other seasons, while others are short. Actually, Bangladesh has three distinct seasons: the pre-monsoon hot season from March through May, rainy monsoon season which lasts from June through October, and a cool dry winter season from November through February. However, March may also be considered as the spring season, and the period from mid-October through mid-November may be called the autumn.
The rainy season (barsa) Traditionally spreads over Asadh and Shraban (mid-June to mid-August). However, the rainy season may start from the end of Baishakh and last up to the beginning of Kartik (mid-May to late-October)
Autumn (sharat) Lasts during Bhadra and Ashvin (mid-August to mid-October)
Late autumn (hemanta) The fourth season, covers Kartik and Agrahayan (mid-October to mid-December). Actually it is a transitional phase between autumn and winter
Winter (s**t) The fifth season and the colder part of the year, in contrast to Summer, the hotter. According to the Bangla calendar it spreads over the months of Paus and Magh (mid-December to mid-February). But practically, November through February is the winter season in Bangladesh
The spring (basanta) The last of the seasons occurs between winter and summer, spreads over the Bangla months Phalgun and Chaitra (mid-February to mid-April). The spring season is very brief in Bangladesh and practically prevails during March only.
Source: Banglapedia