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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grass Valley's climate page.
Grass Valley Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
10°C (50°F)
Chance of Rain
47%
Precipitation
261 mm (10 in)
Rainy days
14 days
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Grass Valley in December
The weather can swing between comfortable and chilly in December, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions.What To Do in Grass Valley in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grass Valley's climate page.
See the full Grass Valley climate overview or explore weather in the United States of America.
