S
M
T
W
T
F
S
26
55°
39°
27
48°
36°
28
49°
38°
29
49°
36°
30
50°
34°
1
50°
33°
2
48°
34°
3
49°
38°
4
50°
36°
5
50°
36°
6
51°
38°
7
52°
39°
8
52°
37°
9
53°
37°
10
52°
40°
11
52°
38°
12
53°
42°
13
58°
42°
14
53°
43°
15
54°
47°
16
62°
44°
17
55°
43°
18
56°
41°
19
59°
50°
20
66°
50°
21
67°
46°
22
57°
43°
23
57°
44°
24
59°
44°
25
60°
47°
26
65°
52°
27
69°
48°
28
68°
47°
29
64°
47°
30
67°
50°
31
61°
52°
1
67°
45°
2
62°
43°
3
61°
43°
4
59°
49°
5
63°
52°
6
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Frontenac Islands
Frontenac Islands's May 2026 forecast shows daily high temperatures ranging from 48° to 69°, with overnight lows between 33° and 53°. The average high for May is 57° with an average low of 43°. 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 Frontenac Islands. See also: June | July | August.
