S
M
T
W
T
F
S
26
84°
62°
27
86°
64°
28
82°
65°
29
84°
65°
30
78°
64°
1
68°
55°
2
73°
52°
3
76°
46°
4
80°
49°
5
80°
53°
6
86°
66°
7
77°
67°
8
72°
64°
9
72°
64°
10
83°
63°
11
86°
64°
12
73°
62°
13
83°
60°
14
84°
61°
15
85°
57°
16
86°
59°
17
86°
62°
18
88°
67°
19
90°
68°
20
88°
70°
21
89°
71°
22
85°
71°
23
87°
67°
24
86°
70°
25
74°
69°
26
79°
70°
27
85°
71°
28
81°
69°
29
81°
68°
30
81°
69°
31
82°
66°
1
84°
65°
2
87°
66°
3
85°
65°
4
85°
66°
5
88°
66°
6
90°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in New Harmony
New Harmony's May 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 65° and 71°. The average high for May is 83° with an average low of 68°. 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 New Harmony. See also: June | July | August.