S
M
T
W
T
F
S
30
82°
63°
31
77°
63°
1
77°
56°
2
80°
53°
3
83°
55°
4
89°
60°
5
68°
49°
6
77°
56°
7
81°
56°
8
76°
50°
9
59°
43°
10
59°
45°
11
62°
49°
12
55°
46°
13
56°
45°
14
58°
47°
15
61°
49°
16
61°
49°
17
63°
48°
18
62°
50°
19
54°
44°
20
56°
45°
21
58°
48°
22
60°
46°
23
60°
47°
24
61°
49°
25
61°
50°
26
60°
48°
27
57°
44°
28
58°
47°
29
58°
47°
30
57°
46°
1
54°
42°
2
54°
41°
3
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sankt Peter
Sankt Peter's September 2026 forecast shows daily high temperatures ranging from 54° to 81°, with overnight lows between 41° and 56°. The average high for September is 61° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Sankt Peter. See also: October | November | December.
