S
M
T
W
T
F
S
30
80°
44°
31
77°
50°
1
76°
45°
2
73°
44°
3
62°
49°
4
76°
60°
5
69°
50°
6
65°
50°
7
77°
47°
8
69°
40°
9
63°
35°
10
81°
55°
11
67°
42°
12
74°
41°
13
64°
41°
14
71°
46°
15
71°
41°
16
75°
42°
17
71°
48°
18
75°
44°
19
65°
44°
20
63°
33°
21
68°
44°
22
66°
36°
23
66°
32°
24
74°
31°
25
76°
35°
26
73°
47°
27
67°
52°
28
57°
52°
29
60°
54°
30
70°
46°
1
72°
44°
2
73°
49°
3
65°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Stephen
St. Stephen's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 St. Stephen. See also: October | November | December.
