S
M
T
W
T
F
S
30
71°
57°
31
78°
60°
1
77°
60°
2
81°
59°
3
81°
61°
4
74°
59°
5
71°
54°
6
72°
53°
7
77°
51°
8
72°
55°
9
72°
56°
10
75°
56°
11
67°
45°
12
80°
44°
13
78°
62°
14
65°
44°
15
68°
41°
16
79°
57°
17
68°
51°
18
67°
47°
19
62°
37°
20
64°
42°
21
57°
38°
22
61°
36°
23
66°
35°
24
66°
37°
25
65°
41°
26
68°
46°
27
68°
45°
28
69°
47°
29
69°
50°
30
70°
47°
1
66°
48°
2
67°
40°
3
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Colton
South Colton's September 2026 forecast shows daily high temperatures ranging from 57° to 70°, with overnight lows between 35° and 50°. The average high for September is 66° with an average low of 43°. 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 South Colton. See also: October | November | December.