Verdict: Fair month
San Sebastián Weather in January
January is mild-to-cool in San Sebastián, topping out near 12°C (54°F) — comfortable with a layer on. Expect showers on roughly 14 days of the month — rarely trip-ruining, worth planning around. January is workable in San Sebastián if your dates are fixed — just plan around the conditions.
Average high
12°C / 54°F
Average low
6°C / 43°F
Rain days
~14
Precipitation
158 mm
What to pack for San Sebastián in January
- Layers — t-shirts under a light jacket or sweater
- Rain gear is non-negotiable — expect rain on roughly 14 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in San Sebastián: Aug (25°C / 77°F) · Coolest: Jan (12°C / 54°F) · Wettest: Dec (~17 rain days)
12°
6°
Jan
15°
8°
Feb
16°
8°
Mar
17°
10°
Apr
20°
12°
May
22°
15°
Jun
24°
17°
Jul
25°
18°
Aug
23°
16°
Sep
21°
14°
Oct
16°
10°
Nov
14°
8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)