For example, in June 14, 2000, the temperature reached 40.6 ☌ (105.1 ☏), but the minimum temperature of the previous night had been 13 ☌ (55.5 ☏), and that of the next night was only 16 ☌ (61 ☏).Īutumn, in October and November, is initially mild, and gradually becomes cooler and rainier. Anyway, these periods of hot weather are very rare (in fact, they may even not occur for a whole year), they do not last long (just one or two days), and the heat is felt only during the day, while it is cooled by the ocean breeze during the evening. The city of San Francisco is indicated by a red star.Įvery so often, however, hot air from the desert manages to reach the city, so much so that the temperature can reach 35/38 ☌ (95/100 ☏) from May to October. In the following map, we can see the average maximum temperatures of August in the San Francisco area, which shows the significant differences that occur in it. The rains are rare, especially in July and August, when basically it never rains.ĭaytime temperatures from June to September are around 17/19 ☌ (63/66 ☏) in the towns on the Pacific coast (see Half Moon Bay) and in the western districts of San Francisco, around 21/23 ☌ (70/73 ☏) in the eastern districts, 22/24 ☌ (72/75 ☏) in Oakland and Richmond (on the other side of the bay), 25/26 ☌ (77/79 ☏) in the towns on the south shore of the bay (see Palo Alto, Mountain View, Fremont), and up to 28 ☌ (82 ☏) in San José, just south of the bay.īeware though: it's sufficient to move to the east, in the Sacramento Valley (see Sacramento, Stockton, Modesto), to find very high temperatures, usually about 33/35 ☌ (91/95 ☏), and sometimes even above 40 ☌ (104 ☏). The foggiest districts (and also the windiest in the afternoon) are the westernmost ones (see Sunset District). September, albeit slightly, is the warmest month. Summer, from June to September, is cool, and it is usually foggy in the morning and sunny in the afternoon, with a cool breeze blowing from the sea. Spring, from mid-March to May, is cool or slightly cold at night, while the days become gradually milder, and sometimes pleasantly warm, though with a moderate breeze in the afternoon that lowers the temperature.

On February 5, 1976, it snowed also in the city, where, however, the temperature remained above freezing, and the snow accumulated significantly (13 cm or 5 inches) only on the hills, such as in Twin Peaks.Įvery so often, fog can form in the city, while this phenomenon is more common in the Sacramento Valley. However, east of the city, in the Sacramento Valley, and more rarely also to the north and the south of the bay, there may be night frosts. Very cold days are rare: at most, the temperature can approach freezing (0 ☌ or 32 ☏) during the night, and only on colder periods it remains about 8/10 ☌ (46/50 ☏) during the day. There are, however, sunny and dry periods, sometimes long. Winter, from December to mid-March, is mild and quite rainy. San Francisco - Average precipitation Month Rainfall is not abundant, since it amounts to about 485 millimeters (19 inches) per year, but the period from November to March is quite rainy in April and October, the rains are quite rare, while from June to September, they are definitely rare and sporadic.

In general, as you move away from the sea, you will find a more continental climate, a bit colder in winter and much warmer in summer. However, in the area, there are different microclimates, which must be taken into account by those who plan to move outside of the city proper (for example, you could go to the Yosemite National Park). San Francisco - Average temperatures (1991-2020) Month

Sf bay area precipitation totals