Like the rest of the Deep South, Mississippi has hot, humid summers and relatively mild winters. Winter temperatures run 31 to 60 F/-1 to 15 C, though they can drop to 32 F/0 C or lower on occasion. Though mild, winter has the most rainfall. High humidity and temperatures of 90 F/32 C and higher are common in summer. Expect March-May to provide temperatures of 43-85 F/6-29 C, with humidity running 54%-85%.
Fall is the most agreeable time—it's drier, with clear, sunny days and temperatures similar to those in spring. Lows may be a bit lower but not substantially so. The weather is normally more stable in the fall; spring can have some severe thunderstorms and occasional tornadoes but can be a fabulous time to visit when the azaleas and dogwoods are blooming.