Long range models are looking at a shift in the jet stream winds which will deliver a set of below normal days in the Ozarks, possibly the longest stretch of such weather all summer!
As far as normal average temperatures are concerned, the longest stretch of normal or below normal days is three, occurring three times in June (summer FYI is June-August to the record-keepers). There have only been 11 such days this summer, only one in July.
Late this week and into the weekend, a cooler mass of air will park over the northeastern U.S., keeping the Ozarks in a cooler pattern. The period of Thursday through Sunday will likely be recorded as below normal days with highs only in the eighties and lows on some mornings in the fifties!
Until then, highs will be back in the nineties on Tuesday and Wednesday.
Rain chances are connected to a front which begins to affect the area on Wednesday and last into Thursday. High pressure now dominates the weekend which looks dry and relatively cool.