The warmest months of the year can be August through November, when the hot, dry Santa Ana desert winds periodically blow in from the east. Temperatures in July, August and September can range from the high 90s in the daytime to the low 70s at night. Even though a few 90-degree days may pop up, it usually begins to cool off in October and November when temperatures return to the low 80s in the daytime and the low 60s at night. The campus is situated north of the city of San Bernardino at the foot of the beautiful San Bernardino and San Gorgonio Mountains. San Diego gets very little rain.
Most rain is during the spring months.
Summer months can range between 80-90 degrees. There is usually at least a 10 degree difference between coastal and inland temperatures in San Diego. The Bay Area is known for its microclimates and San Francisco neighborhoods have different climates as well. On the same day, it may be sunny in the Mission District and foggy in the Sunset District near San Francisco State University. Because the weather can be somewhat unpredictable, some residents wear layers of clothing and always pack an umbrella in case of showers or heavy fog.