S
M
T
W
T
F
S
27
41°
30°
28
40°
32°
29
41°
29°
30
42°
39°
31
47°
40°
1
50°
34°
2
49°
33°
3
42°
31°
4
41°
29°
5
41°
28°
6
40°
29°
7
41°
30°
8
42°
31°
9
43°
30°
10
43°
30°
11
44°
31°
12
43°
32°
13
44°
30°
14
45°
32°
15
45°
33°
16
47°
33°
17
48°
34°
18
47°
34°
19
48°
37°
20
46°
36°
21
46°
37°
22
47°
40°
23
49°
39°
24
47°
36°
25
50°
35°
26
49°
36°
27
46°
36°
28
45°
37°
29
48°
39°
30
47°
32°
31
48°
33°
1
Hist. Avg.
50°
35°
2
Hist. Avg.
50°
35°
3
Hist. Avg.
50°
35°
4
Hist. Avg.
50°
35°
5
Hist. Avg.
50°
35°
6
Hist. Avg.
51°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Rainier
Rainier's January 2027 forecast shows daily high temperatures ranging from 40° to 50°, with overnight lows between 28° and 40°. The average high for January is 45° with an average low of 34°. 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 Rainier. See also: February | March | April.
