I'm sure this is "normal" but August sure seemed cooler/more moderate than what I perceive as "normal." Plus, we started getting mice in our garage about 2 weeks ago. Caught 5 in 10 days. They typically don't start until September-ish.
I suppose the joke will be 80s all through October, then snow Nov. 1 and no temps above 32 until June.
Gotta love North Dakota!
Your definitely not wrong on it being a cool August.