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°
34°
16
77°
48°
17
84°
55°
18
88°
64°
19
84°
50°
20
54°
43°
21
61°
44°
22
67°
53°
23
57°
53°
24
69°
55°
25
74°
53°
26
80°
59°
27
76°
52°
28
75°
51°
29
73°
54°
30
76°
54°
31
74°
57°
1
73°
54°
2
74°
55°
3
75°
53°
4
76°
59°
5
75°
59°
6
69°
54°
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 57° to 80°, with overnight lows between 44° and 59°. The average high for May is 72° with an average low of 54°. 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.
