San Francisco Weather

San Francisco WeatherThe Golden Gate City is one of the top tourist destinations in the world, and prospective visitors to San Fransisco are frequently curious whether the weather in that city is really as cold as it's rumored to be. While not unpleasantly uncomfortable and rarely freezing, San Fransisco doesn't enjoy the warmer temperatures of parts of the state that are further inland and farther south. Surrounded by water on three sides, the climate of the city of San Fransisco is highly influenced by the Pacific Ocean. The area experiences very little variation in temperature and a mild year-round climate. Of major U.S. cities, San Fransisco has the coldest average summer temperature. Fog and cool winds prevail during the months of June, July and August in San Fransisco largely due to the low pressure area created by rising hot air present in the state's interior valleys.

Because the city of San Fransisco contains a remarkable number of regional micro climates, guests and residents typically dress in layers if they are going to be spending much of the day outdoors. The Sunset District is especially prone to dense fog and windy conditions, while those living in or visiting on the east side of the city are likely to see more sunny days. This particular area receives an average of 260 sunny days per year.

San Fransisco experiences a dry period between the months of May and October. Although nighttime temperatures can sometimes be chilly during these months, the days and evenings are usually pleasantly warm. The average high during this period of time is 71 degrees Fahrenheit with lows in the mid-50s. The highest recorded temperature in San Fransisco was 103 degrees Fahrenheit in July of 1998, while the lowest recorded temperature was 27 degrees Fahrenheit in December of 1932.

San Fransisco averages 73 rainy days per year, with annual rainfall being slightly over 26 inches per year. Snow, however, is extremely rare in San Fransisco, with only 10 recorded occurrences.

Visitors to San Fransisco are advised to keep the weather in mind no matter what time of year. Extreme cold weather gear isn't necessary for those traveling to or living in the city, but light rain jackets and warm hats can come in handy. Most residents of San Fransisco decline to include umbrellas among their rain gear because the winds make this item impractical. Because the fog can wreak havoc on carefully styled hair, casual coifs are recommended.