Weather in the Great Plains usually includes broad temperature changes, light to moderate precipitation. low humidity and plenty of sunshine.
January is the coldest month in South Dakota as mean temperatures range from 10 degrees in the east to 14 degrees in the west. July is the warmest month across the state with mean temperatures in the mid to high 60s. Daily high temperatures in the low 80s are common central and south.
South Dakota, like North Dakota, occasionally experiences high temperatures near 90 degrees, while extremely harsh winter temperatures below (0 degrees) are quite normal.
Annual precipitation amounts range from 25 - 30 inches in the east and southeast, while central and far-western South Dakota are in the 15 inches range. The notable exception is the Black Hills area, where yearly rain fall often exceeds 35 inches.
For an interesting look at South Dakota precipitation levels, view this precipitation map.
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