S
M
T
W
T
F
S
28
70°
46°
29
68°
44°
30
69°
44°
1
68°
46°
2
69°
45°
3
72°
45°
4
73°
46°
5
70°
44°
6
70°
47°
7
71°
47°
8
78°
48°
9
78°
47°
10
77°
50°
11
78°
55°
12
79°
57°
13
81°
56°
14
80°
51°
15
79°
53°
16
79°
55°
17
78°
57°
18
81°
57°
19
81°
50°
20
79°
48°
21
72°
52°
22
71°
53°
23
70°
49°
24
72°
56°
25
79°
56°
26
82°
49°
27
80°
49°
28
79°
48°
29
75°
47°
30
74°
48°
31
72°
47°
1
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Chemainus
Chemainus's July 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 44° and 57°. The average high for July is 75° 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 July weather will actually feel in Chemainus. See also: August | September | October.