S
M
T
W
T
F
S
26
63°
39°
27
68°
39°
28
70°
54°
29
54°
43°
30
50°
37°
1
48°
37°
2
46°
32°
3
64°
32°
4
75°
48°
5
64°
48°
6
50°
41°
7
57°
34°
8
63°
36°
9
70°
37°
10
59°
36°
11
50°
34°
12
61°
30°
13
59°
43°
14
61°
37°
15
68°
50°
16
77°
50°
17
75°
60°
18
86°
68°
19
86°
53°
20
58°
40°
21
54°
40°
22
64°
44°
23
67°
50°
24
70°
51°
25
70°
55°
26
72°
57°
27
73°
54°
28
71°
59°
29
72°
57°
30
72°
54°
31
65°
50°
1
66°
48°
2
65°
48°
3
66°
51°
4
68°
58°
5
75°
60°
6
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Clair
St. Clair's May 2026 forecast shows daily high temperatures ranging from 54° to 86°, with overnight lows between 40° and 68°. The average high for May is 70° with an average low of 53°. 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. Clair. See also: June | July | August.
