S
M
T
W
T
F
S
28
69°
55°
29
69°
57°
30
N/A
1
69°
51°
2
64°
56°
3
74°
58°
4
72°
51°
5
75°
51°
6
76°
50°
7
77°
51°
8
78°
50°
9
78°
52°
10
77°
51°
11
76°
53°
12
80°
52°
13
82°
56°
14
76°
51°
15
75°
56°
16
74°
56°
17
70°
52°
18
73°
54°
19
77°
55°
20
77°
54°
21
76°
56°
22
75°
55°
23
76°
56°
24
72°
56°
25
73°
55°
26
76°
56°
27
76°
56°
28
78°
55°
29
76°
55°
30
79°
56°
31
81°
56°
1
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Sumas Prairie
Sumas Prairie's July 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 50° and 58°. The average high for July is 76° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Sumas Prairie. See also: August | September | October.
