With cool to mild weather throughout the year, San Francisco has a pleasant climate. There is little variation in average temperature from season to season. Areas immediately on the coast are the mildest in terms of climate. As one moves inland, the climate becomes more continental with slightly cooler winter temperatures and warmer summer temperatures.
Summer is from June to September, followed by autumn which runs through to November. During these months, the city is frequently covered by a blanket of fog. In winter, rain is common from mid-November to March, so be sure to invest in a raincoat and umbrella.