S
M
T
W
T
F
S
30
69°
61°
31
74°
63°
1
85°
64°
2
83°
62°
3
80°
61°
4
72°
58°
5
74°
58°
6
74°
53°
7
76°
49°
8
75°
51°
9
73°
63°
10
75°
49°
11
72°
44°
12
77°
47°
13
76°
50°
14
66°
43°
15
70°
45°
16
75°
57°
17
73°
54°
18
67°
47°
19
62°
47°
20
67°
52°
21
58°
45°
22
63°
40°
23
64°
45°
24
64°
43°
25
70°
39°
26
71°
46°
27
72°
49°
28
72°
48°
29
73°
49°
30
71°
49°
1
69°
59°
2
63°
42°
3
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Jacobs
St. Jacobs'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. Jacobs. See also: October | November | December.
