There are so many reasons to visit San Francisco, like its majestic bay, romantic fog, and thriving arts and culture scene. Explore San Francisco’s diverse neighborhoods, cross the iconic Golden Gate Bridge, or sample world-class food. While September and October are San Francisco’s most beautiful months, they are also the busiest convention months, which mean hotel rates are higher and rooms are more difficult to find. Generally, prices are best between December and February, though April and May can also be nice. As you might expect from a California city, San Francisco can get quite cold, at least by California standards – and the weather changes rapidly as well. The months of September and October provide gorgeous warm weather.