S
M
T
W
T
F
S
30
81°
58°
31
81°
66°
1
91°
69°
2
83°
69°
3
88°
69°
4
81°
65°
5
79°
56°
6
77°
54°
7
78°
56°
8
79°
59°
9
79°
65°
10
77°
57°
11
71°
54°
12
73°
51°
13
74°
54°
14
78°
55°
15
77°
54°
16
78°
50°
17
72°
48°
18
69°
46°
19
75°
48°
20
75°
53°
21
74°
53°
22
73°
52°
23
73°
50°
24
71°
47°
25
72°
50°
26
72°
53°
27
70°
49°
28
63°
45°
29
62°
44°
30
63°
43°
1
61°
42°
2
62°
45°
3
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pennsylvania Furnace
Pennsylvania Furnace's September 2026 forecast shows daily high temperatures ranging from 61° to 88°, with overnight lows between 41° and 69°. The average high for September is 73° with an average low of 52°. 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 Pennsylvania Furnace. See also: October | November | December.
