S
M
T
W
T
F
S
26
51°
36°
27
49°
35°
28
46°
28°
29
47°
31°
30
44°
35°
1
46°
34°
2
43°
33°
3
43°
28°
4
45°
27°
5
45°
26°
6
51°
29°
7
54°
31°
8
55°
35°
9
57°
35°
10
57°
37°
11
56°
32°
12
50°
34°
13
55°
33°
14
60°
37°
15
57°
35°
16
52°
36°
17
53°
35°
18
53°
34°
19
57°
36°
20
63°
36°
21
64°
39°
22
64°
41°
23
57°
34°
24
56°
33°
25
56°
33°
26
55°
34°
27
56°
34°
28
56°
35°
29
57°
35°
30
56°
36°
31
58°
36°
1
59°
38°
2
61°
40°
3
61°
40°
4
64°
43°
5
66°
43°
6
63°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ruby
Ruby's May 2026 forecast shows daily high temperatures ranging from 43° to 66°, with overnight lows between 26° and 43°. The average high for May is 55° with an average low of 35°. 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 Ruby. See also: June | July | August.