S
M
T
W
T
F
S
31
75°
41°
1
73°
43°
2
75°
45°
3
81°
43°
4
84°
48°
5
84°
56°
6
82°
61°
7
73°
51°
8
84°
65°
9
82°
68°
10
90°
69°
11
89°
66°
12
85°
58°
13
82°
59°
14
76°
55°
15
74°
53°
16
73°
54°
17
75°
56°
18
76°
57°
19
75°
58°
20
77°
57°
21
79°
62°
22
73°
63°
23
74°
63°
24
78°
65°
25
78°
64°
26
75°
66°
27
82°
64°
28
75°
63°
29
74°
64°
30
78°
66°
1
79°
64°
2
76°
62°
3
76°
66°
4
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in St. Clair
St. Clair's June 2026 forecast shows daily high temperatures ranging from 73° to 90°, with overnight lows between 51° and 69°. The average high for June 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 June weather will actually feel in St. Clair. See also: July | August | September.