S
M
T
W
T
F
S
26
64°
35°
27
52°
34°
28
52°
35°
29
57°
41°
30
55°
38°
1
56°
38°
2
59°
43°
3
62°
46°
4
67°
48°
5
68°
49°
6
67°
48°
7
64°
44°
8
68°
47°
9
68°
50°
10
67°
50°
11
70°
52°
12
71°
51°
13
71°
43°
14
60°
41°
15
63°
44°
16
66°
45°
17
64°
43°
18
67°
46°
19
71°
49°
20
70°
53°
21
67°
51°
22
68°
44°
23
65°
44°
24
65°
42°
25
66°
42°
26
66°
45°
27
67°
51°
28
71°
53°
29
73°
49°
30
73°
56°
31
75°
57°
1
73°
53°
2
72°
48°
3
68°
52°
4
74°
58°
5
75°
59°
6
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ionia
Ionia's May 2026 forecast shows daily high temperatures ranging from 52° to 75°, with overnight lows between 34° and 59°. The average high for May is 66° with an average low of 47°. 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 Ionia. See also: June | July | August.