S
M
T
W
T
F
S
26
81°
55°
27
84°
55°
28
58°
47°
29
64°
43°
30
66°
40°
1
67°
42°
2
64°
42°
3
79°
40°
4
80°
61°
5
69°
44°
6
63°
41°
7
68°
51°
8
74°
48°
9
80°
57°
10
68°
46°
11
76°
55°
12
77°
55°
13
78°
53°
14
80°
63°
15
79°
62°
16
78°
60°
17
80°
63°
18
80°
63°
19
81°
64°
20
86°
67°
21
78°
60°
22
73°
60°
23
73°
62°
24
74°
62°
25
74°
63°
26
75°
63°
27
75°
62°
28
76°
62°
29
77°
60°
30
78°
61°
31
78°
62°
1
82°
65°
2
83°
64°
3
83°
65°
4
84°
66°
5
84°
67°
6
82°
66°
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 68° to 86°, with overnight lows between 46° and 67°. The average high for May is 78° with an average low of 61°. 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.
