If San Diego shifted north to San Francisco’s latitude but kept the same longitude, it would be 273 miles inland, 70 miles deep into Nevada, between Henderson Park and the town of Alkali, near the NW edge of Groom Lake.
If San Francisco shifted south to San Diego's latitude but kept the same longitude, it would be 290 miles offshore.
The longest day of summer in San Francisco is 14 hours, 47 minutes, 28 minutes longer than in San Diego. In San Diego on that day, the sun still rises 6 minutes earlier (because SD is so much further east) but sets 34 minutes earlier.
The shortest day of winter in San Francisco is 9h33m, by symmetry, 28 minutes shorter than in San Diego. In San Diego on that day, the sun rises 34 minutes earlier and sets 6 minutes earlier.
On the East Coast, San Francisco is even with Richmond, Virginia. (And, believe it or not, with Cordoba Spain, and is a few miles north of Tunis.) San Diego is even with Charleston, SC, and farther east, it’s even with Morocco, specifically halfway between Casa Blanca and Marrakesh. This is why you can kind of compare the Mediterranean climate here with the "original" one in Europe. Partly because of the Gulf Stream (for which the eastern Pacific has no equivalent), the Old World climates are shifted north. (Glasgow is at the same latitude as the Alaska panhandle!) So weather-wise, San Francisco and San Diego are kind of like North America's Bilbao and Tangier.
Now go about your business.