S
M
T
W
T
F
S
30
90°
66°
31
88°
61°
1
84°
59°
2
90°
64°
3
88°
70°
4
91°
68°
5
82°
68°
6
72°
64°
7
81°
66°
8
86°
64°
9
82°
55°
10
82°
50°
11
86°
61°
12
73°
48°
13
72°
46°
14
64°
52°
15
72°
48°
16
77°
45°
17
68°
59°
18
63°
61°
19
63°
57°
20
70°
57°
21
57°
52°
22
64°
50°
23
72°
52°
24
63°
54°
25
68°
57°
26
63°
59°
27
68°
59°
28
70°
55°
29
68°
57°
30
75°
59°
1
68°
41°
2
66°
36°
3
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. James
St. James'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. James. See also: October | November | December.
