S
M
T
W
T
F
S
27
37°
23°
28
43°
30°
29
50°
32°
30
50°
34°
31
52°
35°
1
53°
30°
2
55°
23°
3
54°
16°
4
39°
16°
5
36°
17°
6
36°
20°
7
37°
21°
8
37°
15°
9
36°
16°
10
35°
15°
11
37°
11°
12
35°
14°
13
33°
10°
14
34°
13°
15
30°
15°
16
32°
16°
17
34°
15°
18
34°
14°
19
36°
23°
20
37°
27°
21
39°
28°
22
39°
26°
23
40°
21°
24
39°
15°
25
38°
14°
26
37°
16°
27
43°
26°
28
45°
30°
29
Hist. Avg.
45°
25°
30
Hist. Avg.
45°
25°
31
Hist. Avg.
46°
25°
1
Hist. Avg.
46°
25°
2
Hist. Avg.
46°
25°
3
Hist. Avg.
46°
25°
4
Hist. Avg.
46°
25°
5
Hist. Avg.
46°
25°
6
Hist. Avg.
47°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Portland
Portland's January 2027 forecast shows daily high temperatures ranging from 30° to 55°, with overnight lows between 10° and 35°. The average high for January is 40° with an average low of 21°. 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.
