 Mean daily temperatures range from 25 ° F ( − 4 ° C ) to 53 ° F ( 12 ° C ) at Tuolumne Meadows at 8 @,@ 600 feet ( 2 @,@ 600 m ) . At the Wawona Entrance ( elevation 5 @,@ 130 feet or 1 @,@ 560 metres ) , mean daily temperature ranges from 36 to 67 ° F ( 2 to 19 ° C ) . At the lower elevations below 5 @,@ 000 feet ( 1 @,@ 500 m ) , temperatures are hotter ; the mean daily high temperature at Yosemite Valley ( elevation 3 @,@ 966 feet or 1 @,@ 209 metres ) varies from 46 to 90 ° F ( 8 to 32 ° C ) . At elevations above 8 @,@ 000 feet ( 2 @,@ 400 m ) , the hot , dry summer temperatures are moderated by frequent summer thunderstorms , along with snow that can persist into July . The combination of dry vegetation , low relative humidity , and thunderstorms results in frequent lightning @-@ caused fires as well . 
