S
M
T
W
T
F
S
30
80°
63°
31
81°
67°
1
89°
70°
2
81°
66°
3
85°
67°
4
82°
66°
5
77°
58°
6
74°
55°
7
74°
54°
8
79°
56°
9
85°
64°
10
80°
65°
11
79°
58°
12
73°
67°
13
81°
59°
14
71°
48°
15
74°
58°
16
80°
63°
17
77°
56°
18
72°
55°
19
68°
51°
20
65°
49°
21
66°
50°
22
69°
51°
23
69°
53°
24
73°
42°
25
64°
48°
26
67°
52°
27
72°
55°
28
72°
52°
29
66°
46°
30
70°
55°
1
70°
52°
2
67°
49°
3
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in State College
State College's September 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 42° and 67°. The average high for September is 71° with an average low of 53°. 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 State College. See also: October | November | December.
