<Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> Bangladesh has a tropical monsoon climate characterised by wide seasonal variations in rainfall, high temperatures, and high humidity . Regional climatic differences in this flat country are minor . Three seasons are generally recognised: a hot, muggy summer from March to June; a hot, humid and rainy monsoon season from June to November; and a warm - hot, dry winter from December to February . In general, maximum summer temperatures range between 38 and 41 ° C (100.4 and 105.8 ° F). April is the hottest month in most parts of the country . January is the coolest month, when the average temperature for most of the country is 16--20 ° C (61--68 ° F) during the day and around 10 ° C (50 ° F) at night . </P> <P> Winds are mostly from the north and northwest in the winter, blowing gently at 1 to 3 kilometres per hour (0.6 to 1.9 mph) in northern and central areas and 3 to 6 kilometres per hour (1.9 to 3.7 mph) near the coast . From March to May, violent thunderstorms, called northwesters by local English speakers, produce winds of up to 60 kilometres per hour (37.3 mph). During the intense storms of the early summer and late monsoon season, southerly winds of more than 160 kilometres per hour (99.4 mph) cause waves to crest as high as 6 metres (19.7 ft) in the Bay of Bengal, which brings disastrous flooding to coastal areas . </P>

Why does northern bangladesh have a humid subtropical climate
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