S
M
T
W
T
F
S
30
82°
67°
31
82°
64°
1
83°
66°
2
83°
68°
3
86°
69°
4
88°
68°
5
88°
68°
6
86°
67°
7
82°
66°
8
81°
67°
9
83°
66°
10
86°
66°
11
86°
65°
12
87°
66°
13
87°
65°
14
86°
65°
15
85°
64°
16
84°
64°
17
84°
63°
18
83°
63°
19
81°
64°
20
84°
63°
21
83°
56°
22
79°
56°
23
79°
57°
24
82°
61°
25
82°
61°
26
81°
60°
27
83°
57°
28
80°
55°
29
73°
54°
30
72°
53°
1
74°
53°
2
74°
59°
3
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Apex
Apex's September 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 53° and 69°. The average high for September is 82° with an average low of 62°. 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 Apex. See also: October | November | December.
