### Instruction: What is the weather like in San Francisco, CA?
### Response: The weather in San Francisco is more mild than in the northern climates of the United States, and its seasonal weather pattern is different as well. Throughout the northern climates, there are four distinct seasons, including a warm (often hot and humid) summer and cold winter (with frequent temperatures below freezing) separated by more mild fall and winter seasons. In the city of San Francisco, the four seasons include a rainy, cool winter, relatively dry and sunny fall and spring, and a summer famous for it's cool foggy weather. This summer fog often fails to reach the suburbs of San Francisco, which are typically hot and dry in the summer.