San Marcos Weather in December

December in San Marcos brings pleasant temperatures, with highs of 19°C (66°F) and nights dropping to 7°C (45°F). It's the rainiest month of the year, so come prepared with waterproof gear.

Rainfall in San Marcos in December

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. You can expect rain on roughly 8 days based on historical data, averaging 79 mm (3.1 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in San Marcos in December

San Marcos in December gets highs of 19°C (66°F) during the day and drops to 7°C (45°F) at night. During December, the winter season is in full swing. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. The temperatures this month are cooler, yet they stay comfortably warm and enjoyable.

Sunshine in San Marcos in December

With approximately 231 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

December in San Marcos can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.