Snow fell Monday in parts of Denali Park. Snow at Eielson Visitor Center (3600' MSL) in July is not unusual, perhaps an every other year event on average. Enough snow to close the road in July much less common. Snow at Headquarters, at 2000' MSL, has only occurred once since observations started 90+ years ago. That was in 2003, when there was an inch of snow at HQ.
No big surprise: 850 mb temperatures at Fairbanks were +2.2C 3pm Monday and +1.4C 3am Tuesday. These are low but not excessively so for mid-July. And warmer weather is on the way.