S
M
T
W
T
F
S
29
44°
35°
30
51°
29°
31
57°
35°
1
47°
42°
2
52°
42°
3
54°
44°
4
64°
42°
5
73°
46°
6
71°
42°
7
56°
36°
8
63°
38°
9
65°
41°
10
64°
40°
11
62°
41°
12
57°
42°
13
58°
41°
14
62°
40°
15
60°
39°
16
60°
42°
17
61°
42°
18
60°
40°
19
55°
35°
20
55°
36°
21
56°
37°
22
54°
37°
23
55°
36°
24
56°
37°
25
57°
37°
26
57°
38°
27
59°
37°
28
61°
40°
29
65°
43°
30
61°
41°
1
66°
45°
2
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sumas Mountain
Sumas Mountain's April 2026 forecast shows daily high temperatures ranging from 54° to 73°, with overnight lows between 35° and 46°. The average high for April is 60° with an average low of 40°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Sumas Mountain. See also: May | June | July.
