S
M
T
W
T
F
S
30
78°
55°
31
76°
61°
1
78°
62°
2
68°
61°
3
81°
66°
4
81°
63°
5
78°
59°
6
71°
52°
7
77°
49°
8
77°
52°
9
80°
57°
10
83°
62°
11
76°
55°
12
76°
49°
13
75°
63°
14
75°
52°
15
70°
56°
16
79°
66°
17
81°
67°
18
82°
61°
19
76°
59°
20
72°
55°
21
70°
60°
22
73°
58°
23
68°
55°
24
70°
53°
25
73°
54°
26
72°
55°
27
68°
56°
28
75°
56°
29
75°
53°
30
68°
51°
1
67°
50°
2
69°
54°
3
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Norwalk
Norwalk's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 50° and 67°. The average high for September is 73° with an average low of 56°. 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 Norwalk. See also: October | November | December.
