The National Weather Service has a cooperative weather station at the park headquarters. January temperatures are a maximum of and a minimum of . July temperatures are a maximum of and a minimum of . The record high temperature was on July 15, 1972. The record low temperature was on January 2, 1960, and December 22, 1990. Average annual precipitation is . The wettest calendar year was 1983 with and the driest 1947 with . The most precipitation in one month was in March 1983. The most precipitation in 24 hours was on February 3, 1998. The most snowfall in one month was in January 1962.