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Climate
Pennsylvania experiences four seasons, although there are variations depending on the area and altitude. Summers tend to be hot and humid, while winters are cold with snow; the mountainous areas are typically cooler in summer, and receive a lot more snow in the winter months. July is usually the warmest month with temperatures averaging 80°F (27°C), although the south is often hotter. The coldest time of year is January. Spring and autumn are the best times to travel, as they are moderate in temperature. Peak tornado season in the eastern US is usually between May and July.