S
M
T
W
T
F
S
26
66°
35°
27
71°
38°
28
67°
44°
29
56°
44°
30
45°
37°
1
50°
31°
2
46°
34°
3
55°
36°
4
64°
41°
5
65°
46°
6
55°
42°
7
50°
38°
8
53°
38°
9
64°
39°
10
50°
41°
11
49°
35°
12
54°
33°
13
48°
43°
14
52°
44°
15
63°
44°
16
71°
48°
17
67°
43°
18
80°
63°
19
80°
60°
20
64°
33°
21
57°
38°
22
64°
43°
23
62°
45°
24
67°
48°
25
68°
47°
26
68°
49°
27
65°
50°
28
68°
48°
29
65°
46°
30
71°
50°
31
64°
48°
1
67°
47°
2
67°
51°
3
68°
52°
4
66°
52°
5
68°
51°
6
73°
52°
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 80°, with overnight lows between 33° and 63°. The average high for May is 68° 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 Rupert. See also: June | July | August.