Verdict: Good month
San Francisco Weather in December
December is mild-to-cool in San Francisco, topping out near 13°C (55°F) — comfortable with a layer on. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. Overall, December is a solid month to visit San Francisco.
Average high
13°C / 55°F
Average low
8°C / 46°F
Rain days
~12
Precipitation
174 mm
What to pack for San Francisco in December
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
December against the rest of the year
Warmest in San Francisco: Oct (21°C / 70°F) · Coolest: Dec (13°C / 55°F) · Wettest: Dec (~12 rain days)
14°
8°
Jan
15°
8°
Feb
14°
9°
Mar
15°
10°
Apr
17°
11°
May
19°
13°
Jun
19°
13°
Jul
20°
14°
Aug
20°
14°
Sep
21°
13°
Oct
16°
10°
Nov
13°
8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)