S
M
T
W
T
F
S
27
34°
24°
28
33°
27°
29
36°
23°
30
37°
28°
31
36°
36°
1
43°
32°
2
43°
26°
3
40°
23°
4
37°
24°
5
35°
22°
6
34°
24°
7
35°
25°
8
36°
26°
9
37°
25°
10
37°
26°
11
38°
27°
12
39°
28°
13
38°
26°
14
39°
26°
15
38°
31°
16
40°
30°
17
42°
29°
18
41°
35°
19
42°
33°
20
43°
33°
21
44°
34°
22
41°
38°
23
45°
37°
24
44°
36°
25
44°
33°
26
45°
34°
27
43°
35°
28
42°
36°
29
43°
37°
30
Hist. Avg.
N/A
31
Hist. Avg.
N/A
1
Hist. Avg.
N/A
2
Hist. Avg.
N/A
3
Hist. Avg.
N/A
4
Hist. Avg.
N/A
5
Hist. Avg.
N/A
6
Hist. Avg.
N/A
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Sumas
Sumas's January 2027 forecast shows daily high temperatures ranging from 33° to 45°, with overnight lows between 22° and 38°. The average high for January is 40° with an average low of 30°. 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 Sumas. See also: February | March | April.
