Originally Posted by
pseudoswede
On the plus side, the days are long and the nights are short in the summer...
I also thought SUX would be a tad less humid, but it's about the same as ATL, so you won't have to miss that.
And should be slightly longer than what you posted, as FSD (Foss Field, Sioux Falls, South Dakota) is a little ways north of SUX (Sioux Gateway Airport, Sioux City, Iowa)
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Sioux Falls metro area is 250k people, obviously a lot smaller than Atlanta. Depends if you feel you can make new friends there, that will affect how isolated you might feel.
OP, the summer will likely be just as hot and humid as Atlanta. However, duration will be MUCH shorter at those temps and humidity levels. May-June and August-September ought to be very beautiful in Sioux Falls. December-March will be cool to cold, windy, some snow. You'll get used to it though after the first year.