Average data for 10 years
1 December
Sunday
+7°
+6°
2 December
Monday
+7°
+5°
3 December
Tuesday
+7°
+5°
4 December
Wednesday
+7°
+5°
5 December
Thursday
+7°
+5°
6 December
Friday
+6°
+5°
7 December
Saturday
+6°
+4°
8 December
Sunday
+6°
+4°
9 December
Monday
+6°
+5°
10 December
Tuesday
+6°
+6°
11 December
Wednesday
+6°
+5°
12 December
Thursday
+7°
+5°
13 December
Friday
+6°
+4°
14 December
Saturday
+6°
+5°
15 December
Sunday
+6°
+4°
16 December
Monday
+6°
+5°
17 December
Tuesday
+7°
+4°
18 December
Wednesday
+6°
+4°
19 December
Thursday
+6°
+5°
20 December
Friday
+6°
+4°
21 December
Saturday
+6°
+4°
22 December
Sunday
+6°
+5°
23 December
Monday
+6°
+4°
24 December
Tuesday
+5°
+4°
25 December
Wednesday
+5°
+3°
26 December
Thursday
+6°
+5°
27 December
Friday
+7°
+5°
28 December
Saturday
+6°
+5°
29 December
Sunday
+5°
+3°
30 December
Monday
+5°
+3°
31 December
Tuesday
+5°
+3°
Cities near you
Canada
Vancouver
United States
Portland
Canada
Kamloops
United States
Aberdeen
United States
Eugene
December in Seattle is the coldest month of the year. In December, the weather in Seattle is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Seattle has 16 rainy, 6 partly cloudy, 5 sunny, and 4 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Seattle.