San Francisco Weather

Microclimate Guide

Mediterranean climate / Cool summers / Mild winters

Average Temp: 57°F (14°C) | Annual Rainfall: 23 inches (584 mm)

Seasonal Microclimates

Weather Tip: San Francisco's famous microclimates mean weather can vary dramatically between neighborhoods. Always carry layers when visiting.

Seasonal Weather Patterns

1Summer (June-August)

Summer brings cool fog and temperatures rarely above 70°F (21°C).

Karl the Fog is most persistent during summer months.

2Fall (September-November)

Warmest months with least fog, often called "Indian Summer".

September and October typically see the highest temperatures.

3Winter (December-February)

Rainy season with mild temperatures around 50-60°F (10-15°C).

Snow is extremely rare in the city.

4Spring (March-May)

Variable weather with alternating sunny days and spring showers.

Wildflowers bloom in surrounding areas during spring.

Pro Tip: The "Fog Belt" affects western neighborhoods more than eastern areas. Check microclimate forecasts for specific locations.

1Downtown/SOMA

Warmer and sunnier than western neighborhoods.

Often 10°F (5°C) warmer than Sunset District.

2Sunset/Richmond

Foggiest areas with cool ocean influence.

Summer highs rarely exceed 65°F (18°C).

3Mission District

Sunniest neighborhood with Mediterranean feel.

Protected from fog by Twin Peaks.

1Karl the Fog

Summer fog that rolls in through the Golden Gate.

Named "Karl" by local residents in 2010.

2Diablo Winds

Hot, dry winds from the northeast in fall.

Increases wildfire risk in the region.

3June Gloom

Persistent overcast conditions in early summer.

Despite the name, can last into July.

4Earthquake Weather

Warm, still days sometimes precede seismic activity.

A local folk belief with no scientific basis.

Important: Always check current conditions before outdoor activities. Weather can change rapidly in different parts of the city.