Bangladesh, generally characterized as a country of six seasons, possesses favorable climatic conditions for agricultural production and creates an approving condition for human habitation. The weather conditions of the country also show extremes and contrasts ranging from floods to drought conditions, from foggy cold weather conditions to high temperatures, from large scale cyclonic events to local level calm microclimatic situations. The book, in this context, presents an assessment of temperature and rainfall data by adopting a retrospective approach aiming to determine their subtle properties. The work also intends to identify if there is any change in the climate of Bangladesh.