S
M
T
W
T
F
S
26
66°
31°
27
74°
33°
28
73°
41°
29
60°
51°
30
51°
42°
1
54°
32°
2
50°
34°
3
56°
37°
4
68°
43°
5
72°
47°
6
47°
42°
7
55°
35°
8
57°
33°
9
61°
44°
10
59°
34°
11
60°
35°
12
57°
38°
13
63°
42°
14
64°
43°
15
74°
52°
16
64°
52°
17
77°
53°
18
77°
52°
19
73°
38°
20
69°
46°
21
60°
42°
22
61°
41°
23
62°
42°
24
68°
47°
25
71°
51°
26
72°
51°
27
67°
45°
28
65°
43°
29
64°
44°
30
71°
53°
31
74°
53°
1
74°
51°
2
69°
49°
3
72°
54°
4
75°
55°
5
76°
55°
6
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Casselman
Casselman's May 2026 forecast shows daily high temperatures ranging from 55° to 77°, with overnight lows between 33° and 55°. The average high for May is 67° with an average low of 46°. 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 Casselman. See also: June | July | August.
