S
M
T
W
T
F
S
30
78°
56°
31
79°
61°
1
80°
58°
2
76°
56°
3
78°
55°
4
79°
53°
5
80°
60°
6
78°
60°
7
80°
58°
8
80°
58°
9
74°
59°
10
77°
57°
11
Hist. Avg.
76°
54°
12
Hist. Avg.
76°
54°
13
Hist. Avg.
76°
54°
14
Hist. Avg.
75°
53°
15
Hist. Avg.
75°
53°
16
Hist. Avg.
74°
53°
17
Hist. Avg.
74°
52°
18
Hist. Avg.
74°
52°
19
Hist. Avg.
73°
51°
20
Hist. Avg.
73°
51°
21
Hist. Avg.
72°
50°
22
Hist. Avg.
72°
50°
23
Hist. Avg.
72°
50°
24
Hist. Avg.
71°
49°
25
Hist. Avg.
71°
49°
26
Hist. Avg.
70°
48°
27
Hist. Avg.
70°
48°
28
Hist. Avg.
69°
48°
29
Hist. Avg.
69°
47°
30
Hist. Avg.
68°
47°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
68°
46°
3
Hist. Avg.
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Halfmoon
Halfmoon's September 2026 forecast shows daily high temperatures ranging from 74° to 80°, with overnight lows between 53° and 61°. The average high for September is 78° 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 Halfmoon. See also: October | November | December.
