S
M
T
W
T
F
S
30
88°
72°
31
89°
72°
1
92°
71°
2
94°
74°
3
92°
75°
4
93°
74°
5
96°
72°
6
87°
71°
7
85°
65°
8
86°
64°
9
86°
67°
10
88°
72°
11
86°
70°
12
87°
71°
13
88°
69°
14
89°
68°
15
88°
67°
16
85°
67°
17
84°
65°
18
83°
67°
19
84°
64°
20
82°
63°
21
85°
67°
22
84°
66°
23
81°
66°
24
80°
65°
25
80°
65°
26
84°
64°
27
84°
64°
28
83°
63°
29
83°
64°
30
82°
63°
1
80°
63°
2
79°
62°
3
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Half Moon
Half Moon's September 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 62° and 72°. The average high for September is 84° with an average low of 66°. 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 Half Moon. See also: October | November | December.
