A good place to follow and track daily weather in San Diego can be found at the Wunderground website (wunderground.com); historical and recent weather data can be found using their search tool. The truth is that anytime of the year is a good time to visit San Diego. The main reason is the temperate weather which is pleasant year round.
Summers tend be cooler than normal, mostly due to coastal fog which burns off as you move inland. Average temperatures year round are ideal for all manner of outdoor activities, ranging from 65 in the winter to 77 in the summer. You can take advantage of the seasonal turnover in the hospitality industry where rates drop to off-peak rates around November first.
Try to pick your time to visit when there isn't something else big going on like a convention or yacht race, or you will compete for hotel rooms and restaurant tables.
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