S
M
T
W
T
F
S
31
69°
42°
1
79°
45°
2
83°
57°
3
72°
56°
4
68°
52°
5
63°
48°
6
59°
47°
7
66°
49°
8
66°
49°
9
65°
50°
10
68°
51°
11
70°
49°
12
72°
52°
13
73°
54°
14
78°
53°
15
78°
55°
16
79°
56°
17
70°
50°
18
67°
48°
19
65°
48°
20
70°
50°
21
71°
49°
22
66°
47°
23
65°
46°
24
65°
45°
25
67°
47°
26
74°
52°
27
76°
52°
28
75°
51°
29
75°
51°
30
74°
52°
1
74°
50°
2
68°
48°
3
71°
50°
4
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Sumas
Sumas's June 2026 forecast shows daily high temperatures ranging from 59° to 79°, with overnight lows between 45° and 56°. The average high for June is 70° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Sumas. See also: July | August | September.
