S
M
T
W
T
F
S
26
56°
45°
27
65°
46°
28
68°
43°
29
62°
42°
30
63°
43°
1
65°
46°
2
63°
41°
3
66°
46°
4
69°
49°
5
70°
50°
6
71°
50°
7
71°
52°
8
72°
52°
9
72°
51°
10
64°
49°
11
62°
49°
12
63°
52°
13
72°
51°
14
66°
47°
15
68°
49°
16
72°
53°
17
74°
54°
18
72°
46°
19
74°
46°
20
67°
44°
21
66°
48°
22
67°
47°
23
66°
48°
24
66°
48°
25
68°
57°
26
76°
55°
27
76°
57°
28
70°
59°
29
80°
56°
30
81°
50°
31
71°
54°
1
74°
53°
2
77°
56°
3
82°
60°
4
81°
52°
5
81°
50°
6
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cascade
Cascade's May 2026 forecast shows daily high temperatures ranging from 56° to 82°, with overnight lows between 41° and 60°. The average high for May is 70° 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 May weather will actually feel in Cascade. See also: June | July | August.