S
M
T
W
T
F
S
27
47°
27°
28
47°
27°
29
48°
32°
30
47°
29°
31
46°
27°
1
45°
25°
2
44°
26°
3
45°
35°
4
47°
40°
5
54°
44°
6
61°
35°
7
62°
26°
8
50°
27°
9
45°
27°
10
46°
26°
11
48°
24°
12
46°
23°
13
44°
24°
14
44°
23°
15
46°
25°
16
46°
27°
17
47°
25°
18
45°
22°
19
42°
21°
20
41°
24°
21
45°
35°
22
49°
41°
23
56°
39°
24
57°
35°
25
53°
29°
26
54°
30°
27
53°
34°
28
52°
27°
29
51°
32°
30
44°
26°
31
46°
26°
1
Hist. Avg.
55°
35°
2
Hist. Avg.
55°
35°
3
Hist. Avg.
55°
35°
4
Hist. Avg.
55°
35°
5
Hist. Avg.
56°
36°
6
Hist. Avg.
56°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Portland
Portland's January 2027 forecast shows daily high temperatures ranging from 41° to 62°, with overnight lows between 21° and 44°. The average high for January is 48° with an average low of 29°. 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 Portland. See also: February | March | April.
