Temperatures can vary by as much as 20 degrees from the base of the mountains to the highest elevations and the top of these ranges receive 80 to 100 inches of precipitation per year. Seasonal Temperatures Month High/Low January 50.1ºF/28.4ºC February 50.7ºF/27.5ºC March 59.8ºF/35.3ºC April y3.5ºF/44.8ºC May 78.0ºF/48.6ºC June 86.2ºF/56.7ºC July 87.1ºF/59.6ºC August 87.1ºF/59.6ºC September 84.1ºF/53.3ºC October 74.1ºF/41.5ºC November 64.4ºF/37.8ºC December 50.6ºF/28.1ºC