Weather in San Sebastian in December

In December, San Sebastian experiences a cool and mild climate. Typical temperatures range from 8°C to 13°C, often accompanied by overcast skies and brief sunny spells. Rainfall is frequent, making the weather feel damp and fresh, with relatively high humidity levels. This climate allows for enjoyable outdoor explorations, provided that you’re prepared for the occasional showers. While it may be a bit chilly, there are unique local seasonal highlights to explore under these atmospheric conditions.

December Climate Overview

• Average Temperature: 8°C – 13°C
• Rainfall: Approximately 150mm
• Sunshine Hours: Around 3 hours per day
• Humidity: Approximately 80%
• Wind Speed: Light to moderate, averaging 12 km/h

What to Expect in December

Daytime Conditions

During the day, San Sebastian feels quite cool. The temperature often climbs to around 13°C, with the occasional burst of sunshine breaking through. High humidity can add to the chill, especially in shaded areas.

Rainfall Patterns

Rain is a frequent visitor during December, typically appearing as short, scattered showers. While intense downpours are rare, the consistent nature of rainfall could impact outdoor plans. It’s wise to be prepared with waterproof attire.

Evening Conditions

As night falls, temperatures drop to about 8°C. Evenings are cooler and often more humid, making a warm jacket advisable. A light breeze adds to the crispness of the night air, which can feel refreshing.

Best Activities in San Sebastian in December

• Outdoor Activities: Hiking through the nearby hills, enjoying the landscape in its winter attire, or exploring the city’s architecture are great possibilities in cooler weather.
• Seasonal Highlights: December often sees the city adorned with festive decorations and markets celebrating the holiday season, offering a cosy charm.
• Water-based or Nature-based Activities: The rugged coastline may invite exploration, but water activities can be less appealing considering the colder sea temperatures and frequent rains.

What to Pack for December

• Warm and layered clothing suitable for fluctuating day and night temperatures
• Protection against rain such as a waterproof coat or umbrella
• Comfortable footwear designed for city walks and nature trails
• A reusable water bottle to stay hydrated