I don’t know what you can blame it on, but it’s obvious by looking at a nation wide temperature map over the last week that the jet stream is dipping down to southern border states. Usually it’s done doing that by early May, and is well up in Canada by now. The last time the Twin cities has had three strait sub 60 days before this week was 1951. That pool pass is getting lonely.
The jet is very far south for summer. Good Observation.
Hit 30 F here last night. But we are out in the north Idaho countryside. Still - mid June?