It's just so easy for something to go wrong to stop that kind of 90+ streak. That's a 13 day streak for Chicago on the GFS and it stops because it's the end of the model run, so who knows if the GFS would have it go even longer.
At the very least, the amount of warmth and at least a decent duration of it in July is going to rack up the temp anomalies to a point that will make it difficult to completely undo as the month goes on.