S
M
T
W
T
F
S
26
80°
57°
27
79°
56°
28
72°
56°
29
72°
55°
30
73°
56°
31
74°
56°
1
77°
55°
2
78°
56°
3
72°
48°
4
72°
48°
5
75°
48°
6
78°
50°
7
76°
49°
8
72°
50°
9
73°
56°
10
79°
56°
11
81°
56°
12
81°
57°
13
82°
56°
14
82°
56°
15
81°
52°
16
81°
48°
17
79°
51°
18
77°
54°
19
73°
51°
20
71°
54°
21
71°
46°
22
72°
46°
23
71°
48°
24
73°
52°
25
76°
53°
26
78°
54°
27
78°
55°
28
79°
54°
29
79°
55°
30
78°
55°
31
78°
53°
1
77°
52°
2
77°
51°
3
74°
49°
4
71°
52°
5
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chemainus
Chemainus's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 45° and 57°. The average high for August is 76° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Chemainus. See also: September | October | November.
