San Francisco Weather Forecast

The City by the Bay is reknowned as one of the most romantic and interesting cities for tourists who arrive from all over the world.

The San Francisco Bay area in general offers mild and comfortable summer temps. Typica highs in the 60s to low 70s Fahrenheit (15-21°C) but even in summer, you may encounter cool and foggy conditions, especially near the coast.

Temperatures over 90 degrees Fahrenheit (32°C). Fog may roll in from the cool Pacific Ocean and create fog in mornings near the coast. Winter is the rainy season, yet fall and spring offer mild temperatures, moderate humidity, and less fog for ideal tourist sightseeing.

Unique Microclimates: Be prepared for variations in weather depending on where you are in the city. The microclimates can result in different conditions from one neighborhood to another.

7 Day Weather Forecast for San Francisco Bay Area

SAN FRANCISCO WEATHER

Seasonal Weather in San Francisco

Here’s a detailed overview of the average weather conditions in San Francisco, California, for each season, including temperature ranges, humidity, UV reports, precipitation, sunshine days, pollution, storms, winds, and the frequency of days with temperatures over 90 degrees Fahrenheit:

Winter (December to February):

• Temperature Range: Winters in San Francisco are mild. Highs range from 55°F (13°C) to 60°F (15°C), while nighttime lows range from 45°F (7°C) to 50°F (10°C).
• Humidity: Humidity levels remain moderate during the winter months.
• UV Reports: UV levels are lower in winter but can still be significant on sunny days.
• Precipitation: Winter is the wettest season in San Francisco. Average monthly rainfall ranges from 3 to 4 inches.
• Sunshine Days: While there are sunny days, winter often brings more overcast and rainy conditions to San Francisco.
• Air Quality/Pollution: Air quality is generally good in the winter, with minimal pollution.
• Storms: Winter can bring periods of heavy rain and storms, with occasional gusty winds.
• Winds: Breezy conditions persist in the winter, especially along the coast.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are extremely rare in San Francisco during the winter due to its coastal location.

Fall (September to November):

• Temperature Range: Fall in San Francisco is characterized by mild temperatures. Highs range from 65°F (18°C) to 70°F (21°C), while nighttime lows range from 55°F (13°C) to 60°F (15°C).
• Humidity: Humidity levels remain moderate, contributing to pleasant weather conditions.
• UV Reports: UV levels decrease slightly in the fall, but sun protection is still advisable.
• Precipitation: Fall is still relatively dry in San Francisco, with minimal rainfall. The city often experiences the return of coastal fog.
• Sunshine Days: While there are sunny days, expect occasional overcast conditions in the fall.
• Air Quality/Pollution: Air quality is generally good in the fall, with minimal pollution.
• Storms: Fall is not typically associated with significant storms in San Francisco.
• Winds: Breezy conditions continue, especially along the coast.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in San Francisco during the fall due to the coastal influence.

 

Spring (March to May):

• Temperature Range: Spring in San Francisco is characterized by mild temperatures. Highs typically range from 60°F (15°C) in March to 65°F (18°C) in May, while nighttime lows range from 50°F (10°C) to 55°F (13°C).
• Humidity: Humidity levels are moderate in spring, creating a comfortable climate.
• UV Reports: UV levels are generally moderate in spring, so sun protection is advisable.
• Precipitation: Spring is one of the wetter seasons in San Francisco. Average monthly rainfall ranges from 2 to 3 inches.
• Sunshine Days: While spring offers some sunny days, San Francisco is known for its foggy conditions during this season.
  Air Quality/Pollution: Air quality is generally good in San Francisco, with minimal pollution.
• Storms: Spring can bring occasional rain showers, but significant storms are less common.
• Winds: San Francisco is known for its breezy conditions, and spring is no exception. The onshore flow brings cool breezes.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in San Francisco during spring due to its coastal location.

Summer (June to August):

• Temperature Range: Summers in San Francisco are cool compared to many other California cities. High temperatures typically range from 60°F (15°C) to 70°F (21°C), with nighttime lows between 50°F (10°C) and 55°F (13°C).Humidity: Humidity levels remain moderate, contributing to a comfortable climate.
• UV Reports: UV levels are moderate to high, so sun protection is essential.
• Precipitation: Summer is the driest season in San Francisco, with minimal rainfall. The city often experiences a “fog belt” that can bring overcast conditions.
• Sunshine Days: While there are sunny days in summer, San Francisco is famous for its fog, which can limit sunshine.
• Air Quality/Pollution: Air quality is generally good in the summer, with minimal pollution.
• Storms: Significant storms are rare during the summer, but coastal fog is prevalent.
• Winds: Breezy conditions persist in the summer due to the cool marine layer.
• Days Over 90 Degrees: Days over 90 degrees Fahrenheit are exceedingly rare in San Francisco during the summer due to the cooling influence of the Pacific Ocean.

San Francisco’s weather offers a unique coastal experience with relatively mild temperatures throughout the year. Tourists can expect cool, foggy summers and mild, rainy winters, with the most pleasant weather occurring during the spring and fall months.

 

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