S
M
T
W
T
F
S
26
61°
45°
27
73°
45°
28
63°
50°
29
59°
45°
30
55°
43°
1
51°
32°
2
51°
34°
3
61°
48°
4
70°
55°
5
64°
44°
6
56°
41°
7
53°
36°
8
56°
42°
9
61°
45°
10
66°
46°
11
65°
48°
12
66°
49°
13
65°
46°
14
63°
49°
15
66°
50°
16
65°
46°
17
67°
54°
18
74°
56°
19
73°
56°
20
74°
57°
21
76°
57°
22
76°
58°
23
75°
54°
24
69°
49°
25
68°
52°
26
72°
58°
27
77°
58°
28
72°
57°
29
72°
54°
30
71°
55°
31
75°
52°
1
70°
53°
2
71°
58°
3
70°
52°
4
71°
51°
5
71°
52°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Wapakoneta
Wapakoneta's May 2026 forecast shows daily high temperatures ranging from 51° to 77°, with overnight lows between 32° and 58°. The average high for May is 67° with an average low of 50°. 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 Wapakoneta. See also: June | July | August.