Field Trip Logistics. Having a well planned visit to the park helps keep everyone stress free the day of your field trip. NPS Photo. Phone: Field Trip Logistics - White Sands National Park (U.S. National Park Service) Heat. Our summer months, May through August, daytime temperatures can exceed 100° F (38° C). June is usually the hottest month of the year. It is recommended that you do not start a hike if the temperature is above 85° F (30° C).