<P> Tornadoes are most likely in the spring . Major tornado outbreaks affected parts of eastern North Carolina on March 28, 1984, and April 16, 2011 . The month of May experiences the greatest rise in temperatures . During the spring, there are warm days and cool nights in the Piedmont . Temperatures are somewhat cooler in the mountains and warmer, particularly at night, near the coast . North Carolina's humidity is lowest in the spring . </P> <P> North Carolina experiences high summer temperatures . Sometimes, cool, dry air from the north will invade North Carolina for brief periods of time, with temperatures quickly rebounding . It remains colder at high elevations, with the average summer temperature in Mount Mitchell lying at 68 ° F (20 ° C). Morning temperatures are on average 20 ° F (12 ° C) lower than afternoon temperatures, except along the Atlantic Coast . The largest economic loss from severe weather in North Carolina is due to severe thunderstorms in the summer, although they usually only hit small areas . Tropical cyclones can impact the state during the summer as well . Fogs are also frequent in the summer . </P> <P> Fall is the most rapidly changing season temperature wise, especially in October and November . Tropical cyclones remain a threat until late in the season . The Appalachian Mountains are frequently visited at this time of year, due to the leaves changing color in the trees . </P> <P> During El Niño events, winter and early spring temperatures are cooler than average with above average precipitation in the central and eastern parts of the state and drier weather in the western part . La Niña usually brings warmer than average temperatures with above average precipitation in the western part of the state while the central and coastal regions stay drier than average . </P>

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