S
M
T
W
T
F
S
26
86°
68°
27
81°
67°
28
82°
64°
29
87°
61°
30
90°
68°
1
89°
73°
2
90°
64°
3
79°
63°
4
81°
62°
5
86°
65°
6
89°
68°
7
90°
73°
8
83°
70°
9
84°
71°
10
85°
70°
11
86°
70°
12
85°
70°
13
86°
71°
14
85°
70°
15
87°
68°
16
82°
70°
17
83°
69°
18
84°
71°
19
87°
72°
20
87°
72°
21
84°
71°
22
83°
69°
23
82°
67°
24
82°
70°
25
83°
72°
26
85°
73°
27
83°
73°
28
83°
72°
29
84°
73°
30
84°
72°
31
83°
73°
1
83°
73°
2
84°
74°
3
84°
74°
4
85°
73°
5
85°
73°
6
86°
74°
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 79° to 90°, with overnight lows between 62° and 74°. The average high for May is 85° with an average low of 70°. 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.
