S
M
T
W
T
F
S
30
94°
73°
31
95°
72°
1
94°
73°
2
98°
73°
3
99°
74°
4
84°
77°
5
94°
75°
6
98°
75°
7
100°
74°
8
94°
72°
9
89°
73°
10
87°
75°
11
92°
74°
12
91°
73°
13
95°
72°
14
92°
71°
15
91°
70°
16
92°
69°
17
91°
70°
18
91°
69°
19
90°
67°
20
87°
66°
21
90°
70°
22
90°
70°
23
88°
69°
24
89°
69°
25
88°
68°
26
88°
68°
27
87°
67°
28
87°
68°
29
84°
68°
30
87°
67°
1
87°
65°
2
84°
59°
3
78°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Arnold Line
Arnold Line's September 2026 forecast shows daily high temperatures ranging from 78° to 100°, with overnight lows between 58° and 75°. The average high for September is 89° with an average low of 69°. 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 Line. See also: October | November | December.
