S
M
T
W
T
F
S
26
68°
39°
27
70°
50°
28
63°
50°
29
52°
36°
30
54°
32°
1
48°
34°
2
57°
30°
3
70°
45°
4
81°
41°
5
57°
41°
6
54°
30°
7
63°
32°
8
70°
32°
9
72°
39°
10
63°
32°
11
63°
37°
12
73°
39°
13
64°
39°
14
72°
34°
15
81°
52°
16
82°
59°
17
84°
63°
18
81°
64°
19
75°
52°
20
64°
45°
21
59°
41°
22
70°
46°
23
71°
55°
24
80°
54°
25
84°
60°
26
85°
58°
27
78°
57°
28
79°
52°
29
77°
49°
30
70°
49°
31
72°
51°
1
76°
54°
2
78°
54°
3
77°
56°
4
78°
56°
5
76°
54°
6
75°
60°
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 70° to 85°, with overnight lows between 49° and 60°. The average high for May is 77° with an average low of 55°. 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.