After checking the weather forecast for San Francisco for 3 days or for 14 days, you’ll most likely pack only light clothing — and regret it.
The weather in Frisco is quite unpredictable. It differs significantly from other Californian cities. Summers here are windy and not as hot as one might expect: on average, +20–23°C. Winters are mild but rainy: the average air temperature in December–January is +13°C, and in February — +15°C.
By the way, when looking at weather forecasters' forecasts, keep in mind that in America, temperatures are measured in Fahrenheit, not Celsius. To make it easier for you to see the weather in San Francisco for a week, day or month, use a metric converter.
Although no San Francisco weather forecast will tell you about the city's peculiarities, such as the need to carry warm clothes with you at all times (even in the summer!). Why?
The thing is, the weather in San Francisco changes not only from month to month, day to day, or hour to hour, but also from one neighborhood to another. After walking just a few blocks comfortably in a T-shirt and shorts, you may suddenly find yourself in an area where your nose turns red and your teeth start chattering from the cold — forcing you to duck into a store for a sweater or jacket.
If you want to experience real summer, you should come to the Bay City in October rather than in June or July. But no one will tell you that — except for locals or fellow travelers who’ve already been here. The weather forecast for San Francisco for 5 days or even a month isn’t all that accurate; you’re lucky if it gets the next 24 hours right.