San Francisco Weather Today

San Francisco Climate and Weather Overview

San Francisco, located in the western United States, is known for its unique microclimates and varied weather patterns. The city experiences a Mediterranean climate characterized by mild, wet winters and dry summers. The city's proximity to the Pacific Ocean and the surrounding topography contribute to the diverse weather conditions observed across different neighborhoods within the city.

San Francisco Temperature and Weather by Season

The table below provides a summary of the average temperatures and weather conditions for San Francisco by season:

San Francisco's temperatures are moderated by the cold California Current which flows southward along the coast, keeping the city cooler in the summer and warmer in the winter compared to inland areas.

Annual Precipitation and Fog in San Francisco

San Francisco receives most of its annual precipitation during the winter months, with January being the wettest month. The city experiences an average of 20 inches (510 mm) of rainfall annually, with a majority of the precipitation occurring between November and March.

One of the most iconic weather phenomena associated with San Francisco is its fog. Often referred to as "Karl the Fog," the city experiences regular fog events, especially during the summer months. The fog is a result of the interaction between the cool, moist air from the Pacific Ocean and the warm air over the land, creating the perfect conditions for the formation of fog.

Microclimates in San Francisco

San Francisco is known for its microclimates, which are characterized by distinct weather patterns within relatively small geographic areas. The city's varied topography, including hills, valleys, and proximity to the ocean, contributes to these microclimates. For example, the western and southern parts of the city are typically cooler and foggier than the eastern and northern areas. This variation in microclimates allows for a wide range of temperatures and weather conditions across different neighborhoods.

Weather Extremes in San Francisco

While San Francisco generally experiences mild and moderate weather, the city can occasionally witness weather extremes. Heat waves are rare but can occur, especially during late summer or early fall, when high-pressure systems bring hot air from inland areas. Conversely, cold snaps can occur during the winter months, with temperatures occasionally dropping below freezing, especially in the outlying areas of the city.

Conclusion

In conclusion, San Francisco's Mediterranean climate, characterized by mild, wet winters and dry summers, creates a unique and varied weather experience for residents and visitors. The city's microclimates, annual precipitation, and iconic fog contribute to its diverse weather patterns. Understanding the distinct weather conditions of San Francisco is essential for anyone looking to visit or settle in this beautiful and dynamic city.