Arroyo Grande Weather in December

December in Arroyo Grande averages 18°C (64°F) during the day and 6°C (43°F) at night. It is the wettest month of the year, with 74 mm (2.9 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Arroyo Grande in December

With frequent rain showers this month, having an umbrella on hand will keep you dry. Analyzing past climate data, one can expect approximately 9 days of rain, averaging 74 mm (2.9 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Arroyo Grande in December

In December, Arroyo Grande gets moderate temperatures, with highs of 18°C (64°F). Nights cool to around 6°C (43°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. While this month has some of the cooler temperatures of the year, it's far from cold and remains pleasant.

Sunshine in Arroyo Grande in December

The days are predominantly sunny, with an estimated total of around 220 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

December in Arroyo Grande has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.