San Ramon Weather in December

With daytime temperatures of 14°C (57°F) and nighttime lows of 4°C (39°F), December in San Ramon brings moderate temperatures during the day. It is also the wettest month of the year, so pack an umbrella.

Rainfall in San Ramon in December

During the wettest month of the year, an umbrella can be your best friend to stay dry. Past climate data indicates that roughly 13 days will see rain, totalling around 111 mm (4.4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in San Ramon in December

In December, San Ramon sees moderate temperatures, with highs of 14°C (57°F). Nights drop to around 4°C (39°F). December marks the winter season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. December is typically the month with the mildest temperatures of the year.

Sunshine in San Ramon in December

The area enjoys a balanced 160 hours of sunlight, ensuring it's neither too overcast nor too sunny.

December in San Ramon 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.