S
M
T
W
T
F
S
26
54°
29°
27
47°
27°
28
47°
26°
29
53°
28°
30
41°
25°
1
50°
28°
2
63°
35°
3
62°
36°
4
53°
29°
5
49°
33°
6
55°
36°
7
58°
37°
8
59°
37°
9
61°
38°
10
70°
36°
11
62°
29°
12
53°
28°
13
52°
27°
14
53°
27°
15
60°
32°
16
64°
34°
17
66°
38°
18
66°
38°
19
65°
39°
20
66°
39°
21
66°
38°
22
64°
38°
23
65°
39°
24
64°
40°
25
64°
39°
26
69°
41°
27
70°
42°
28
71°
43°
29
67°
43°
30
65°
42°
31
71°
43°
1
71°
43°
2
70°
44°
3
63°
44°
4
65°
43°
5
64°
39°
6
66°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harmony
Harmony's May 2026 forecast shows daily high temperatures ranging from 41° to 71°, with overnight lows between 25° and 44°. The average high for May is 61° with an average low of 36°. 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 Harmony. See also: June | July | August.