S
M
T
W
T
F
S
26
70°
37°
27
62°
43°
28
60°
46°
29
69°
40°
30
73°
41°
1
74°
46°
2
80°
46°
3
79°
56°
4
85°
54°
5
75°
51°
6
70°
49°
7
66°
44°
8
66°
48°
9
70°
50°
10
72°
51°
11
71°
49°
12
74°
51°
13
70°
51°
14
72°
49°
15
72°
49°
16
64°
43°
17
60°
44°
18
59°
43°
19
60°
40°
20
60°
43°
21
68°
48°
22
66°
47°
23
65°
46°
24
68°
48°
25
68°
46°
26
67°
48°
27
69°
49°
28
70°
49°
29
69°
50°
30
70°
49°
31
71°
50°
1
71°
49°
2
70°
50°
3
70°
50°
4
69°
48°
5
68°
48°
6
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chemainus
Chemainus's May 2026 forecast shows daily high temperatures ranging from 59° to 85°, with overnight lows between 40° and 56°. The average high for May is 69° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Chemainus. See also: June | July | August.
