S
M
T
W
T
F
S
30
74°
61°
31
74°
61°
1
73°
60°
2
74°
61°
3
74°
61°
4
73°
60°
5
73°
61°
6
74°
60°
7
73°
61°
8
72°
60°
9
73°
61°
10
75°
61°
11
74°
60°
12
73°
61°
13
72°
61°
14
72°
60°
15
73°
59°
16
74°
60°
17
74°
61°
18
73°
61°
19
70°
60°
20
71°
59°
21
72°
61°
22
73°
60°
23
74°
59°
24
73°
61°
25
73°
61°
26
71°
59°
27
70°
58°
28
72°
59°
29
73°
57°
30
73°
58°
1
72°
60°
2
73°
61°
3
70°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in San Manuel Chaparron
San Manuel Chaparron's September 2026 forecast shows daily high temperatures ranging from 70° to 75°, with overnight lows between 57° and 61°. The average high for September is 73° with an average low of 60°. 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 San Manuel Chaparron. See also: October | November | December.