S
M
T
W
T
F
S
26
80°
60°
27
85°
61°
28
75°
54°
29
66°
49°
30
66°
44°
1
66°
46°
2
66°
43°
3
80°
38°
4
77°
58°
5
70°
46°
6
61°
46°
7
69°
38°
8
77°
46°
9
81°
49°
10
71°
52°
11
76°
45°
12
78°
46°
13
79°
56°
14
79°
53°
15
79°
66°
16
84°
72°
17
84°
70°
18
86°
74°
19
75°
59°
20
65°
58°
21
75°
62°
22
74°
62°
23
76°
60°
24
83°
60°
25
84°
63°
26
76°
64°
27
82°
64°
28
80°
65°
29
82°
66°
30
84°
62°
31
76°
61°
1
77°
60°
2
80°
63°
3
81°
65°
4
82°
65°
5
86°
64°
6
83°
68°
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 76° to 86°, with overnight lows between 60° and 68°. The average high for May is 81° with an average low of 63°. 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.