- Weather: Many people think San Diego has sunny skies and warm weather 365 days a year, but in fact, it endures 102 cloudy days per year on average, according to the data published by The Western Regional Climate Center's Desert Research Institute1.
Like the rest of California, San Diego gets most of its rain in the winter, and like most coastal areas, it gets lots of clouds and fog in early summer. August through November have the clearest skies and you can expect moderate temperatures year round.
In summer, the top sights are crowded with tourists, especially during the annual influx of visitors escaping Arizona's summer heat. Spring and fall are busy but not hectic, but big conventions bring crowds to the Gaslamp any time of year.
Hotel rates are least busy November through January (except when a big convention comes to town). The busiest convention months in 2009 were February, May and July.
- Annual Events: Whether you're looking for a special event to attend or just trying to avoid the crowds that gather for ComicCon, this Annual Event Guide will give you a month-by-month summary of what's going on.
How Long to StayOur list of San Diego sights A to Z is more than 20 items long and you can browse through a dozen great ways to spend a vacation day in San Diego. Throw in some tours and a couple of day trips and your visit could easily last two weeks. According to the San Diego Visitor's Bureau, people stay just four nights on the average and you may have even less time than that, so some prioritizing is essential.
These are the highlights, but before you start planning, you need to know that it takes a full day to visit the San Diego Zoo, Sea World, San Diego Zoo Safari Park or Legoland.
If you have just one day, take a harbor cruise. Before it or afterward, take a drive over the bridge to Coronado or putter along the coast up to La Jolla. Both are fun places to visit and they have great beaches, too.
If you have a weekend, you can slow down a bit. Plan a weekend getaway and you'll have time to visit one of the attractions that take a full day.