S
M
T
W
T
F
S
26
52°
40°
27
60°
39°
28
62°
28°
29
64°
31°
30
65°
35°
1
64°
32°
2
74°
33°
3
77°
42°
4
67°
40°
5
65°
37°
6
66°
41°
7
78°
35°
8
83°
46°
9
79°
46°
10
81°
41°
11
88°
46°
12
90°
50°
13
85°
58°
14
80°
47°
15
84°
47°
16
80°
45°
17
74°
32°
18
50°
31°
19
61°
31°
20
68°
33°
21
78°
38°
22
74°
46°
23
81°
50°
24
81°
50°
25
78°
54°
26
78°
53°
27
71°
48°
28
66°
41°
29
71°
45°
30
77°
49°
31
81°
53°
1
85°
55°
2
85°
57°
3
84°
56°
4
83°
54°
5
82°
55°
6
83°
53°
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 66° to 85°, with overnight lows between 41° and 57°. The average high for May is 79° with an average low of 52°. 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.