November to February is considered as the peak tourist season in Bangladesh . The country has temperate weather. Winter season is considered as the peak season when temperature is low compare to the other time of the year. During winter season temperature fluctuates between 12 and 20 Degree Celsius without some exception of recent years when temperature went down below 12. In winter, people love to travel in Bangladesh due to the soothing weather. There are almost no rains during this period. At the end of the December, there are huge crowds in Chittagong regions as people gothere to celebrate New Year in Beaches. Two main tourist destinations in Bangladesh are Cox’s Bazar and Sunderban (which is the longest beach and largest mangrove forest of the world respectively) pass their busiest time during winter. You can also visit someareas of Bangladesh during the rainy seasonas they have best view in rainy season (May to July). Rangamati, Banderban andSylhets are the main tourist destinations for the rainy season. In summer and rainy season, the temparature raom around 28-35 Degree Celcius and there are torrential rainfalls in May, June and July. But it does not mean that there will be rain for 5/6 days in a row. You can also visit Bangaldesh in summer and rainy season. But you have to prepare for sudden rain.