Union Square, San Francisco

Square Central San Francisco plaza and major shopping district

Central San Francisco plaza known for department stores, hotels and the Powell Street cable‑car turnaround; visitors come for shopping, theaters, dining and city events.

Main image

Union Square is a central public plaza and commercial district in downtown San Francisco, known as a focal point for shopping, hotels and cultural activity since the 19th century.

The site was established during San Francisco’s rapid 19th-century growth and took the name Union Square in the 1860s following pro-Union gatherings during the American Civil War. It evolved into a retail and hotel district through the 20th century and remains a major commercial center.

Union Square sits in the heart of San Francisco’s downtown, a short walk north of Market Street and adjacent to major streets including Powell and Geary; its central position places it within walking distance of many downtown transit connections.

  • Central location: Located two blocks north of Market Street in downtown San Francisco and surrounded by major department stores, hotels and theaters.
  • Events and use: Hosts a seasonal ice rink and public events; the plaza sees heavy foot traffic year-round and is a major shopping district focal point.

What to See #

  • Union Square Park: A roughly triangular landscaped public park covering about 2.6 acres at the heart of the plaza, with art, seating and seasonal plantings.
  • Powell Street cable car turnaround: The Powell Street cable car turnaround and boarding area sit at the southwest edge of the square and provide a major visitor transport link and photo opportunity.
Union Square, San Francisco
Union Square, San Francisco, CA, United States
37.7878, -122.4070
Public space - open 24 hours
Free (public plaza)

How to Get to Union Square, San Francisco #

Union Square is served directly by Powell Street BART and Muni; both the Powell St. BART station and several Muni bus and streetcar lines stop within a block of the square. The Powell-Hyde and Powell-Mason cable car lines terminate nearby at Powell and Market streets.

Tips for Visiting Union Square, San Francisco #

  • Use Powell Street BART for the quickest access; the Powell Station is one block from the square.
  • Avoid weekend afternoons if the goal is to shop without crowds - midweek mornings are far quieter.
  • Don't miss the Dewey Monument and the pedestrian arcade that runs up to Geary Street for window shopping and people-watching.

Best Time to Visit Union Square, San Francisco #

Union Square is busiest in summer; September-October often has the clearest, warmest weather.

Summer
June-August · 12-20°C (54-68°F)
Tourist peak season; cooler temperatures than many visitors expect due to marine layer and fog.
Fall (best for clear skies)
September-November · 13-22°C (55-72°F)
Often the clearest and warmest time of the year in San Francisco; good for shopping and outdoor dining.
Winter/Spring
December-May · 8-16°C (46-61°F)
Quieter retail periods and occasional rain; city events keep the square lively.

Weather & Climate near Union Square, San Francisco #

Climate

Union Square, San Francisco's climate is classified as Warm-Summer Mediterranean - Warm-Summer Mediterranean climate with mild summers (peaking in September) and cool winters (coldest in January). Temperatures range from 6°C to 23°C. Moderate rainfall (761 mm/year) with a pronounced dry season.

Temperature & Rainfall
Temperature Range
23°
Warmest Month
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 14°C and lows of 6°C. The wettest month with heavy rain (158 mm).

Comfort

10°
Feels Like Cool
10°C
Temperature
14°

Weather

158 mm
Rainfall
3.6 m/s
Wind
Light Breeze

February

February is cool with highs of 16°C and lows of 8°C. Significant rainfall (136 mm).

Comfort

12°
Feels Like Cool
12°C
Temperature
16°

Weather

136 mm
Rainfall
3.9 m/s
Wind
Light Breeze

March

March is cool with highs of 17°C and lows of 8°C. Significant rainfall (118 mm).

Comfort

13°
Feels Like Cool
13°C
Temperature
17°

Weather

118 mm
Rainfall
4.3 m/s
Wind
Light Breeze

April

April is cool with highs of 19°C and lows of 9°C. Moderate rainfall (48 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
19°

Weather

48 mm
Rainfall
4.6 m/s
Wind
Light Breeze

May

May is cool with highs of 20°C and lows of 10°C. Light rainfall.

Comfort

15°
Feels Like Cool
15°C
Temperature
10° 20°

Weather

16 mm
Rainfall
4.9 m/s
Wind
Light Breeze

June

June is cool with highs of 21°C and lows of 11°C. Almost no rain.

Comfort

16°
Feels Like Cool
16°C
Temperature
11° 21°

Weather

5 mm
Rainfall
4.9 m/s
Wind
Light Breeze

July

July is cool with highs of 22°C and lows of 12°C. The driest month with just 2 mm.

Comfort

17°
Feels Like Cool
17°C
Temperature
12° 22°

Weather

2 mm
Rainfall
4.5 m/s
Wind
Light Breeze

August

August is cool with highs of 22°C and lows of 12°C. Almost no rain.

Comfort

17°
Feels Like Cool
17°C
Temperature
12° 22°

Weather

3 mm
Rainfall
4.3 m/s
Wind
Light Breeze

September

September is cool with highs of 23°C and lows of 12°C. Almost no rain.

Comfort

18°
Feels Like Cool
18°C
Temperature
12° 23°

Weather

8 mm
Rainfall
3.8 m/s
Wind
Light Breeze

October

October is cool with highs of 22°C and lows of 11°C. Moderate rainfall (42 mm).

Comfort

17°
Feels Like Cool
17°C
Temperature
11° 22°

Weather

42 mm
Rainfall
3.6 m/s
Wind
Light Breeze

November

November is cool with highs of 18°C and lows of 9°C. Significant rainfall (105 mm).

Comfort

13°
Feels Like Cool
13°C
Temperature
18°

Weather

105 mm
Rainfall
3.5 m/s
Wind
Light Breeze

December

December is cool with highs of 14°C and lows of 7°C. Significant rainfall (120 mm).

Comfort

10°
Feels Like Cool
10°C
Temperature
14°

Weather

120 mm
Rainfall
3.6 m/s
Wind
Light Breeze

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