S
M
T
W
T
F
S
30
92°
70°
31
91°
70°
1
89°
65°
2
89°
60°
3
81°
62°
4
83°
68°
5
87°
69°
6
88°
66°
7
89°
67°
8
87°
66°
9
83°
66°
10
82°
60°
11
79°
59°
12
79°
59°
13
80°
64°
14
83°
65°
15
84°
65°
16
80°
64°
17
79°
63°
18
79°
54°
19
76°
54°
20
74°
56°
21
75°
59°
22
78°
62°
23
80°
62°
24
81°
63°
25
82°
53°
26
81°
54°
27
73°
54°
28
72°
53°
29
72°
53°
30
72°
61°
1
81°
60°
2
Hist. Avg.
76°
54°
3
Hist. Avg.
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Arrowhead
Arrowhead's September 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 53° and 70°. The average high for September is 81° with an average low of 61°. 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 Arrowhead. See also: October | November | December.
