The water that surrounds San Francisco regulates its climate, meaning that the temperature does not change that much between seasons.
Regardless of when you visit, it is likely that the city will be covered by its characteristic fog, formed by the combination of the cold ocean air and the heat of the Californian peninsula.
Summer in San Francisco
Summer in San Francisco is not overwhelming, as although temperatures rise, it is not extremely warm and temperatures drop at night. We recommend bringing light, but warm clothing as temperatures generally range between 50 and 70º F (10 and 21ºC).
Winter in San Francisco
Winters in San Francisco tend to be cold, particularly in January and February when temperatures drop to as low as 41ºF (5ºC), with highs of 57ºF (14ºC).
The Best Time to Visit
We think that the best time to visit the city is in the summer (from May to September), as they are the warmest months with the least rain.
Throughout the year, the temperatures are prone to drop considerably at night, so don't forget to pack suitable clothes. Even if you travel in the height of summer, you'll still need something to wrap up with during the evenings.