S
M
T
W
T
F
S
30
83°
66°
31
86°
66°
1
83°
65°
2
88°
65°
3
88°
61°
4
87°
59°
5
80°
64°
6
85°
64°
7
84°
62°
8
81°
58°
9
80°
62°
10
79°
63°
11
86°
62°
12
85°
63°
13
86°
63°
14
85°
62°
15
84°
61°
16
80°
59°
17
81°
53°
18
76°
53°
19
76°
50°
20
75°
50°
21
73°
49°
22
73°
54°
23
74°
53°
24
80°
56°
25
79°
57°
26
79°
57°
27
80°
55°
28
79°
54°
29
78°
53°
30
77°
51°
1
74°
50°
2
76°
52°
3
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Saint James
Saint James's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 45° and 66°. The average high for September is 80° with an average low of 58°. 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 Saint James. See also: October | November | December.
