San Francisco – Weather
San Francisco has a temperamental microclimate that means different districts within the city often experience varying temperatures. The weather in San Francisco can be tricky to predict because of this, but you can generally expect mild, dry summers and cool, damp winters.
Summer runs from June to August with temperatures ranging from 11°C at night to highs of 23°C in July, which is the hottest time of year. If you want to do some shopping and sightseeing, summer is perfect with clear blue skies and up to 14 hours of warm sunshine per day.
Autumn weather in San Francisco is mild with a daily average of 14°C in September and October. Things cool off in November, which sees highs of 13°C and up to seven rainy days spread over the month. Despite the rain, you can still expect up to eight hours of sunshine in autumn.
The weather in San Francisco is quite cool in winter with lows of 7°C in January and daily averages ranging from 10°C to 15°C. It’s also quite damp with 119mm of rain per month, which means you can expect at least 11 rainy days a month between December and February.