S
M
T
W
T
F
S
27
48°
37°
28
46°
35°
29
46°
39°
30
47°
32°
31
48°
31°
1
44°
31°
2
43°
36°
3
47°
39°
4
47°
32°
5
48°
36°
6
44°
33°
7
45°
34°
8
44°
38°
9
45°
39°
10
46°
38°
11
48°
37°
12
48°
37°
13
46°
39°
14
45°
39°
15
47°
37°
16
Hist. Avg.
48°
38°
17
Hist. Avg.
48°
38°
18
Hist. Avg.
48°
38°
19
Hist. Avg.
48°
38°
20
Hist. Avg.
48°
38°
21
Hist. Avg.
48°
38°
22
Hist. Avg.
49°
38°
23
Hist. Avg.
49°
38°
24
Hist. Avg.
49°
38°
25
Hist. Avg.
49°
38°
26
Hist. Avg.
49°
38°
27
Hist. Avg.
49°
38°
28
Hist. Avg.
49°
38°
29
Hist. Avg.
49°
38°
30
Hist. Avg.
49°
38°
31
Hist. Avg.
49°
38°
1
Hist. Avg.
49°
38°
2
Hist. Avg.
49°
38°
3
Hist. Avg.
49°
38°
4
Hist. Avg.
49°
38°
5
Hist. Avg.
50°
38°
6
Hist. Avg.
50°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Seattle
Seattle's January 2027 forecast shows daily high temperatures ranging from 43° to 48°, with overnight lows between 31° and 39°. The average high for January is 46° with an average low of 36°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Seattle. See also: February | March | April.
