S
M
T
W
T
F
S
30
81°
56°
31
75°
68°
1
88°
68°
2
72°
68°
3
86°
66°
4
84°
70°
5
79°
63°
6
79°
59°
7
77°
54°
8
81°
54°
9
84°
61°
10
86°
68°
11
81°
59°
12
79°
54°
13
81°
64°
14
75°
45°
15
74°
51°
16
80°
61°
17
82°
65°
18
83°
58°
19
76°
62°
20
81°
58°
21
72°
60°
22
73°
56°
23
71°
51°
24
72°
51°
25
72°
52°
26
70°
53°
27
76°
54°
28
76°
53°
29
75°
51°
30
70°
47°
1
69°
52°
2
71°
52°
3
73°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Macungie
Macungie's September 2026 forecast shows daily high temperatures ranging from 69° to 83°, with overnight lows between 45° and 65°. The average high for September is 75° with an average low of 54°. 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 Macungie. See also: October | November | December.
