The best times to visit San Francisco in California is from late May to June and from September to early October, when the weather is pleasant and it’s not as busy as in July and August.
San Francisco from January to March
From January to March you will find low-season rates, brisk but rarely cold days, and the colorful Lunar New Year parade.
San Francisco from May to August
From May to August farmers markets and festivals make up for high-season rates and chilly afternoon fog.
San Francisco from September to November
From September to November in San Francisco you will find blue skies, free concerts, bargain hotel rates and flavor-bursting harvest cuisine.
Rain in San Francisco
The most rainy months are January (4.7 in.) and February (4.15in.), followed by March, November and December.
The driest months are July (0.4in.) and August (0.9in.), followed by June and May.