S
M
T
W
T
F
S
30
92°
67°
31
91°
66°
1
91°
66°
2
90°
67°
3
91°
65°
4
87°
66°
5
87°
65°
6
90°
68°
7
91°
69°
8
91°
68°
9
90°
68°
10
90°
67°
11
89°
68°
12
90°
68°
13
90°
67°
14
89°
67°
15
89°
65°
16
88°
66°
17
88°
63°
18
87°
62°
19
86°
65°
20
87°
66°
21
88°
65°
22
84°
64°
23
87°
63°
24
85°
64°
25
85°
63°
26
86°
61°
27
Hist. Avg.
84°
62°
28
Hist. Avg.
83°
62°
29
Hist. Avg.
83°
61°
30
Hist. Avg.
83°
61°
1
Hist. Avg.
82°
61°
2
Hist. Avg.
82°
60°
3
Hist. Avg.
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Norristown
Norristown's September 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 61° and 69°. The average high for September is 89° with an average low of 66°. 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 Norristown. See also: October | November | December.
