Temperatures in Utah can dip below freezing in the winter, but you will be rewarded with truly breathtaking views in Arches during the winter months.
During the summer months, Big Bend can reach over 100 degrees. This makes for awful weather during a hike or an extended camping trip. Instead, visit during the winter months to enjoy daytime temperatures in the 60s or even 70s!
Summer in Everglades National Park can be miserable due to excessive humidity and insects galore. A winter visit allows you to avoid the bugs and stifling heat while seeing the largest subtropical wilderness in the United States