S
M
T
W
T
F
S
26
70°
46°
27
63°
45°
28
59°
43°
29
55°
36°
30
52°
30°
1
54°
36°
2
64°
30°
3
72°
45°
4
66°
43°
5
52°
36°
6
49°
37°
7
61°
36°
8
67°
46°
9
68°
39°
10
58°
40°
11
65°
46°
12
66°
44°
13
70°
49°
14
73°
52°
15
73°
52°
16
66°
49°
17
70°
48°
18
70°
52°
19
71°
49°
20
65°
42°
21
66°
44°
22
65°
43°
23
65°
47°
24
66°
50°
25
67°
51°
26
68°
48°
27
71°
51°
28
74°
49°
29
75°
54°
30
76°
56°
31
78°
56°
1
73°
50°
2
76°
57°
3
80°
59°
4
78°
56°
5
70°
53°
6
69°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Frontenac
Frontenac's May 2026 forecast shows daily high temperatures ranging from 49° to 80°, with overnight lows between 36° and 59°. The average high for May is 69° with an average low of 49°. 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. See also: June | July | August.
