S
M
T
W
T
F
S
30
83°
58°
31
86°
65°
1
89°
72°
2
92°
70°
3
87°
67°
4
80°
64°
5
79°
59°
6
77°
55°
7
77°
54°
8
84°
64°
9
87°
69°
10
76°
57°
11
78°
54°
12
82°
63°
13
82°
59°
14
83°
63°
15
82°
61°
16
76°
52°
17
72°
50°
18
69°
49°
19
67°
48°
20
71°
49°
21
70°
48°
22
72°
52°
23
71°
53°
24
76°
52°
25
76°
53°
26
77°
52°
27
74°
51°
28
76°
53°
29
77°
53°
30
77°
52°
1
76°
52°
2
74°
46°
3
72°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kittanning
Kittanning's September 2026 forecast shows daily high temperatures ranging from 67° to 87°, with overnight lows between 43° and 69°. The average high for September is 76° 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 Kittanning. See also: October | November | December.