Washington Weather in December

December in Washington averages 11°C (52°F) during the day and -1°C (30°F) at night. It is the wettest month of the year, with 34 mm (1.3 in) of snow/rainfall on average, so waterproof gear is a must.

Rainfall in Washington in December

Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. Typically around 6 days of snow/rainfall are expected, averaging 34 mm (1.3 in) for the month. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in Washington in December

In December, Washington sees low temperatures, with highs of 11°C (52°F). Nights drop to around -1°C (30°F). This month falls in the winter season. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights drop below freezing to -1°C (30°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. December is typically the month with the mildest temperatures of the year.

Should you favor a climate that's both dry and comfortably warm, March, April, May, October and November typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.