Was in Yellowstone about 25 years ago when we woke to 5 inches of snow. Daughter recorded it on our first Hi8 camcorder.
I’ve fished on the Firehole river in August in a blizzard. Nothing unusual, weather can change fast there.
Taking the new RV there next week. First trip with grandkids.
Yes...I have a friend who has lived all her life near Bozeman...she’s said it can snow ANY MONTH OF THE YEAR...