Grass Valley Weather in December

December in Grass Valley typically sees daytime highs of 10°C (50°F) and nighttime lows of 1°C (34°F). As the wettest month of the year, expect more rainfall than other months. It falls within the winter season.

Rainfall in Grass Valley in December

With the year's heaviest rain occurring this month, it's best to be equipped with a poncho to handle the frequent downpours. Based on our climate data of the past 30 years, about 14 days of rain are anticipated, with 261 mm (10 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Grass Valley in December

December in Grass Valley sees highs of 10°C (50°F) and lows of 1°C (34°F) overnight. The winter season takes place during December. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. Nights fall to 1°C (34°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. December is typically the month with the mildest temperatures of the year.

December in Grass Valley 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.