S
M
T
W
T
F
S
30
95°
63°
31
100°
65°
1
100°
70°
2
101°
73°
3
101°
72°
4
99°
73°
5
100°
71°
6
94°
63°
7
92°
65°
8
95°
72°
9
95°
73°
10
93°
66°
11
87°
63°
12
82°
63°
13
86°
63°
14
88°
65°
15
86°
63°
16
80°
58°
17
81°
63°
18
80°
62°
19
79°
62°
20
81°
61°
21
81°
62°
22
82°
61°
23
82°
59°
24
81°
60°
25
79°
61°
26
78°
56°
27
70°
50°
28
70°
48°
29
68°
48°
30
70°
50°
1
69°
53°
2
73°
56°
3
68°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Arnold
Arnold's September 2026 forecast shows daily high temperatures ranging from 68° to 101°, with overnight lows between 48° and 73°. The average high for September is 83° 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 Arnold. See also: October | November | December.
