S
M
T
W
T
F
S
26
45°
36°
27
46°
38°
28
46°
35°
29
45°
32°
30
47°
39°
1
48°
36°
2
47°
36°
3
53°
41°
4
57°
41°
5
55°
40°
6
49°
41°
7
59°
44°
8
60°
43°
9
60°
42°
10
50°
40°
11
52°
42°
12
52°
43°
13
53°
42°
14
53°
44°
15
57°
45°
16
59°
44°
17
63°
45°
18
58°
36°
19
53°
35°
20
54°
36°
21
53°
35°
22
55°
35°
23
56°
37°
24
57°
43°
25
60°
46°
26
63°
40°
27
60°
40°
28
59°
44°
29
58°
43°
30
62°
43°
31
58°
44°
1
62°
43°
2
62°
46°
3
65°
51°
4
67°
43°
5
64°
46°
6
61°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Ignace
St. Ignace's May 2026 forecast shows daily high temperatures ranging from 45° to 67°, with overnight lows between 32° and 51°. The average high for May is 56° with an average low of 41°. 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 St. Ignace. See also: June | July | August.