S
M
T
W
T
F
S
26
57°
35°
27
57°
37°
28
61°
38°
29
63°
38°
30
67°
39°
1
72°
43°
2
75°
45°
3
71°
48°
4
65°
44°
5
70°
43°
6
71°
45°
7
68°
45°
8
72°
46°
9
78°
51°
10
70°
45°
11
61°
38°
12
61°
41°
13
66°
42°
14
72°
47°
15
74°
48°
16
75°
50°
17
75°
48°
18
74°
49°
19
76°
50°
20
76°
50°
21
75°
49°
22
69°
47°
23
71°
46°
24
73°
49°
25
77°
51°
26
78°
50°
27
79°
53°
28
77°
51°
29
78°
52°
30
78°
52°
31
77°
51°
1
77°
52°
2
76°
52°
3
78°
53°
4
78°
52°
5
72°
52°
6
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rupert
Rupert's May 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 35° and 53°. The average high for May is 72° with an average low of 47°. 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 Rupert. See also: June | July | August.