Washington Weather in December

December in Washington averages 7°C (45°F) during the day and -3°C (27°F) at night. Quite a bit of snow/rainfall is typical this month, with around 97 mm (3.8 in) on average. An umbrella is a good idea.

Rainfall in Washington in December

Records from the past 30 years suggest around 10 days of snow/rain, with 97 mm (3.8 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Washington in December

Washington in December gets highs of 7°C (45°F) during the day and drops to -3°C (27°F) at night. Experience the winter season in December. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With lows of -3°C (27°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated.

Sunshine in Washington in December

The month experiences a moderate amount of sunlight, with 128 hours of sunshine. This provides a nice balance between sunshine and clouds.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Washington. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.

Washington Temperature in December

Min Temperature -3°C (27°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 33%  

Precipitation 97 mm (3.8 in)  

Rainy days 10 days  

Humidity 74% *  

Sunshine 128 hours *  

Percentage Sunshine 44% *  

* Data from: St. Louis, the United States of America (71 KM, 44 Miles).

What to Wear in Washington in December

We recommend to layer up for chilly conditions in Washington in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Washington in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

1/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.

More climate data for Washington

Temperature Rainfall Sunshine Humidity

See the full Washington climate overview or explore weather in the United States of America.