Bryce had warm days and freezing cold nights while we were there in May. It was so cold the morning we got up early to watch the sunrise, the digital thermometer in Bob's truck said "ICE"--really!!! Not only was it below freezing, we had high winds. However, we stuck it out and got some nice photos. Then we went back to the camper and I crawled under the covers for 2 hours to warm back up. That afternoon we did a hike down into the canyon in very pleasant temperatures and under amazing blue skies.