S
M
T
W
T
F
S
31
66°
44°
1
64°
43°
2
65°
48°
3
70°
50°
4
71°
50°
5
71°
48°
6
70°
44°
7
69°
42°
8
62°
48°
9
64°
49°
10
69°
45°
11
67°
47°
12
65°
47°
13
63°
45°
14
63°
44°
15
65°
49°
16
69°
49°
17
69°
51°
18
71°
52°
19
69°
52°
20
67°
51°
21
68°
52°
22
72°
53°
23
73°
52°
24
74°
54°
25
73°
54°
26
74°
53°
27
72°
55°
28
75°
53°
29
75°
55°
30
76°
55°
1
71°
54°
2
77°
55°
3
77°
53°
4
70°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in West St. Peters
West St. Peters's June 2026 forecast shows daily high temperatures ranging from 62° to 77°, with overnight lows between 42° and 56°. The average high for June is 70° with an average low of 50°. 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 West St. Peters. See also: July | August | September.