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Seattle Weather in December, USA

Seattle Averages December

SEATTLE AVERAGES FOR DECEMBER

  • What is Average Temperature?
    The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

    Temperature

    5°C
    41°F
  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    High Temperature

    8°C
    46°F
  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    Low Temperature

    2°C
    36°F
  • What is Average Sea Temperature?
    Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

    Sea Temperature

    8°C
    46°F
  • What are Average Daily Sunshine Hours?
    Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

    Sunshine Hours

    2 hours
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall Days

    19 days
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall

    150 mm

Slide and Tap Other Months

Seattle Daily Averages December

December 2024 Daily Averages

Sun
1 Avg 43º
Mon
2 Avg 43º
Tue
3 Avg 41º
Wed
4 Avg 41º
Thu
5 Avg 41º
Fri
6 Avg 41º
Sat
7 Avg 41º
8 Avg 41º
9 Avg 41º
10 Avg 43º
11 Avg 41º
12 Avg 41º
13 Avg 43º
14 Avg 41º
15 Avg 43º
16 Avg 43º
17 Avg 43º
18 Avg 41º
19 Avg 41º
20 Avg 41º
21 Avg 43º
22 Avg 41º
23 Avg 43º
24 Avg 41º
25 Avg 41º
26 Avg 41º
27 Avg 41º
28 Avg 41º
29 Avg 39º
30 Avg 39º
31 Avg 41º
Forecast
Avg Historical Daily Average

December Weather Averages

Sorted by popularity:

The winter weather continues into December.

This means cool but mild days that see little sunshine, with overcast skies and plenty of rain.

Snow and fog can also come in this month, but are usually quick to clear up.

The average daily temperature expected in Seattle in this month is 8°C (46°F), dropping to an average temperature of 2°C (36°F).

Seattle sees up to 2 hours of sunshine per day throughout the month.

The average expectation for rain fall for this month is 150 mm over 19 days.

Seattle in this month expects an average of 5 days of snow or foggy weather.

The average temperature of the sea during this month is 8°C (46°F).

For any ski or snowboard enthusiasts, snow on the mountains in December means that most of the resorts around Seatle are open for the season.

Parades, games, shopping and Santa are all on offer with the Enumclaw Christmas Parade & Holiday Celebration, bound to get you in the festive spirit.

More holiday fun is on offer with the Winterfest at Seattle Center, with ice skating, dances and plenty more festive fun going on.

The ever popular Matzo Ball that goes on across America on Christmas eve is a singles mixer and dance for Jewish singletons.

The Tree Lighting Celebration and Holiday Parade is another ever popular annual event in Seattle. The fun goes on throughout the entire day, ending with a spectacular fireworkds display in the evening. Not to be missed!