Sioux Falls hasn't experienced a month with below average high temperatures since June of last year.
It doesn't look like that will happen this year. By the looks of it, we're about a month ahead of schedule, not only in the temperature department, but also in the weather pattern.
With warm air in place, the jet stream will be to our north, probably for much of the month. This will allow for much of the showers and storms to move to our north as they ride the apex of the jet around KELOLAND.
This means when we do get rain, there's a better chance it will happen at night when the low level jet kicks in. The low level jet is a ribbon of air at the lower levels of the atmosphere; it is caused by the temperature difference at night throughout the upper plains of the United States.
In the months ahead, the weather pattern may suggest we have better chance of drying out. This will most likely happen in the months of July and August, during the hottest time of year. So be thankful for whatever rain you may get.