Yellowstone weather in late May/early June

The best advice for Yellowstone in May/June is to be prepared for any kind of weather! They had 5" of snow in parts of Yellowstone last weekend. It has been a relatively warm winter/spring in the area, though. Y is in a wet pattern at the moment, but it's been warm enough to be mostly rain rather than snow. Still...bring layers!

Iffy, at best. Prepare for anything. Have a great trip!

Take plenty of bug spray.

We spent a week at Madison CG in early June, 2013. Several nights of 32 degrees. Rain and Sleet one day.
Would I go back at the same time? YES!!!
In fact plans are to return early June 2016.

I'd be ready for snow but it probably won't stay on the ground long barring a major storm.

Tuesday May 19th. You won't need bug spray yet. We're getting rain mixed with hail at 5000 ft near Cody today. Temp is 38 degrees at 5000 ft level in Cody at 7 PM. Suspect colder up in Yellowstone park. Pretty close to normal weather for spring. Late May or earlie June better weather. In June you will see a lot more wild life. As weather warms wild life seems to go to higher elevation. Saw a few earlie bird RVers in Cody Walmart today. (about 4 RVs in Walmart Cody parking area) What do you want to see? Cody has a lot going on around July 4th but pretty warm in the park and see less wild life in the park. JMHO I would plan my trip for June just before the rug rats get out of school. OK OK pick on me but I live here and it is JMHO. Around Cody you can see herds of antelope on the badger basin road but by July they also go to higher elevations. Pocolodi ranch folks, thats us.

Our favorite time to visit Yellowstone and Grand Teton is end of May to 3rd week of June. It just gets too crowded after that and campsites are harder to find without advance reservations, which we avoid. Also we don't tow a car so we need to be there at a time of year when parking for our 24ft MH is easier to get at the attractions.

We have experienced snow in mid-June on several of our visits to Yellowstone and Grand Teton, but it melted quickly the same day. Last year we drove in the south entrance on June 2nd and were surprised to see Lewis Lake still frozen. Lots of snow still in the woods too. When we drove back down to Grand Teton on the 16th the snow in the trees was all but gone and Lewis lake was ice free. The next day we had snow flurries at Grand Teton. As already suggested above, bring layers to be ready for a temperature range - lows down to the 20's at night and up to 80's during warmer days are possible.

We have never needed bug spray at either Park in June.

Here's the weather stats for YNP over the last 100+ years. Van Wert is 778 ft. ASL. Yellowstone is 7,938 ft. ASL. Wear shorts and bring a parka. :)

We were in Yellowstone last year early June. We loved every moment and we're going back this year. One of our fondest memories was walking around the geyser trail -near Old Faithful-while it snowed. We had been warned in advance,thanks to this forum,to be prepared-so we were. We wore layers that could easily be tucked in back packs when not needed. We had warm days and cool days and snow days but nothing that stopped us from seeing everything we wanted to see,and it didn't seem to stop anyone else. In my opinion it's a great time of year because the critters are out and moving and the crowds were manageable. We saw buffalo,lots of those,wolves, bears,elk, eagles,otters, pronghorn, moose (Grand Teton's)
We stayed in RV at Fishing Bridge. We made sure to have plenty of blankets for the cold nights but we never felt cold challenged.
Have a great time! The place is amazing as is Grand Teton NP. Only warning....keep your distance from the critters. People get crazy and think the big brown bear can't really run that fast-until it does-and all bets are off. We saw people walking up to within feet of massive buffalo just to get a close up pic. As someone else posted, a young just tourist was gored trying to do that. Bring binoculars and give them space.
Just reread a few posts and I would agree that even when it snowed it really didn't stay on the ground that long-so we were never impeded in our travels at all.

Make your 2016 reservations for Fishing Bridge RV Campground now.