S
M
T
W
T
F
S
27
41°
29°
28
40°
32°
29
42°
29°
30
42°
33°
31
43°
41°
1
48°
36°
2
49°
32°
3
45°
31°
4
43°
30°
5
41°
29°
6
40°
28°
7
42°
31°
8
43°
32°
9
43°
31°
10
44°
31°
11
44°
33°
12
45°
33°
13
44°
32°
14
45°
32°
15
44°
35°
16
45°
34°
17
46°
34°
18
46°
37°
19
47°
37°
20
46°
38°
21
47°
38°
22
46°
42°
23
49°
39°
24
48°
40°
25
47°
37°
26
48°
36°
27
46°
39°
28
45°
40°
29
46°
41°
30
46°
31°
31
46°
34°
1
47°
41°
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
January Weather in Seattle
Seattle's January 2027 forecast shows daily high temperatures ranging from 40° to 49°, with overnight lows between 28° and 42°. The average high for January is 45° with an average low of 35°. 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.
