Spring in Haleakalā can see some more crowds to the park than the offseasons of Winter and Fall. Overall the weather is pleasant and the park is perfectly accessible.
Spring in Joshua Tree
Spring in Joshua Tree is the best with temperatures warming to the 80s, abundant sunshine, reduced crowds, and long nights for stargazing.
Spring in Virgin Islands National Park
Spring in Virgin Islands National Park is wonderful with warm to hot temperatures, abundunt sunny weather, and not quite as crowded as Summer.