America has mostly a temperate type of climate, but it is tropical in Florida and Hawaii, arctic in Alaska, semiarid in the great plains west of the Mississippi River and arid in the Great Basin of the southwest. The low winter temperatures in the northwest areameliorated occasionally in January and February by warm Chinook winds from the eastern slopes of the Rocky Mountains.
USA is a big country, it varies tremendously in climate conditions. Generally the western and southern half of the USA has an overall warmer weather, as compared to the eastern and northern half. Eastern/Northern half is extremely cold in winters accompanied by heavy snowfall, and has pleasant summers. Whereas the Western/Southern part has extremely hot summers and comparatively tolerable winters. Find out beforehand where you are going to stay, so as to prepare yourself for the climate conditions. USA can be divided into six climate regions, excluding Alaska, Hawaii and outlying territories. The climate varies considerably between different regions.
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