Climate According to the Köppen Climate Classification system, Alpine has a warm-summer Mediterranean climate, abbreviated "Csa" on climate maps.Climate Summary for Alpine, California Summers are warm and dry, and winters are cool with moderate precipitation. Temperatures are more extreme than coastal San Diego, similar to nearby El Cajon and Ramona, and less extreme than the nearby mountain and desert regions, such as Julian.
Climate According to the Köppen Climate Classi.fication system, Alpine has a warm-summer Mediterranean climate, abbreviated "Csa" on climate maps.Climate Summary for Alpine, Californ,ia Summers are warm and dry, and winters are cool with moderate precipitation Temperatures are more extreme than coastal San Diego sim,ilar to nearby El Cajon and Ramona and less extreme than the nearby mountain and desert regions, such as Julian.