SeasonScore
San Francisco, United States
Photo: Brocken Inaglory · CC BY-SA 3.0

United States

San Francisco in December

🧥 Winter

Cool and some showers.

🎒 Pack: warm jacket for evenings · compact umbrella or rain jacket

Best months: Aug (9.5), Jul (9.4), Sep (9.4)

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Why December scores 8.0What goes into the score

How it works
🌡️ 14° / 8°C🌧️ 121 mm💧 dew pt 7°🍃 PM2.5 27
  • Weather comfort7.8
    • !Cool (14°C highs / 8°C lows)
    • ✓Comfortable humidity (dew point 7°C)
    • !Wet: ~121 mm rain, ~5 heavy-rain days
  • Air quality6.8
    • !Elevated (PM2.5 ~27 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut December side by side with another month
DecAug
Score8.0 Very good9.5 Excellent
Season🧥 Winter☀️ Summer
High / low14° / 8°20° / 13°
Rain121 mm2 mm
Humiditydew pt 7°dew pt 12°
PM2.527 µg/m³10 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: San Francisco weather-station normals. Rainfall: San Francisco weather-station normals (national met service).

Holidays & crowdsDecember 2026

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Christmas Day 25–27 Dec · 3 days off in a row

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore San FranciscoEvents, sights, food & souvenirs

Check event dates locally

Hilly Northern California city on a peninsula, known for the Golden Gate Bridge, cable cars, Alcatraz and distinctive neighbourhoods.

Events in December

No major events on our calendar for December.

Coming up later

Chinese New Year Festival and ParadeDate variesLunar calendar — usually February, date moves each year

One of the largest Chinese New Year parades outside Asia.

Why go: Crowded; arrive early for a good viewing spot.

Where: Chinatown and downtown

Bay to BreakersDate variesUsually a Sunday in May

A long-running footrace famous for runners in costumes.

Why go: Roads along the route close.

Where: From the bay to Ocean Beach

San Francisco PrideDate variesUsually the last weekend of June

One of the largest Pride celebrations in the world.

Why go: Very crowded; transit is busy.

Where: Market Street and Civic Center

Plan this tripTickets, data and transfers for San Francisco

Airport transfer Kiwitaxi

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