S
M
T
W
T
F
S
26
81°
54°
27
84°
63°
28
61°
55°
29
64°
46°
30
66°
39°
1
64°
43°
2
63°
41°
3
81°
39°
4
84°
54°
5
70°
46°
6
63°
41°
7
68°
39°
8
75°
46°
9
82°
55°
10
70°
48°
11
79°
43°
12
82°
50°
13
75°
50°
14
77°
45°
15
82°
61°
16
81°
68°
17
86°
66°
18
79°
66°
19
75°
61°
20
68°
55°
21
75°
55°
22
68°
63°
23
77°
63°
24
80°
55°
25
82°
59°
26
76°
65°
27
81°
65°
28
81°
65°
29
78°
59°
30
76°
60°
31
82°
59°
1
78°
60°
2
80°
58°
3
82°
60°
4
84°
61°
5
85°
62°
6
84°
60°
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 76° to 85°, with overnight lows between 55° and 65°. The average high for May is 81° 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 St. Clair. See also: June | July | August.
