S
M
T
W
T
F
S
30
70°
65°
31
73°
66°
1
83°
69°
2
82°
68°
3
78°
62°
4
77°
58°
5
75°
56°
6
75°
60°
7
76°
59°
8
74°
62°
9
76°
64°
10
74°
60°
11
71°
60°
12
73°
56°
13
69°
56°
14
73°
54°
15
72°
60°
16
77°
59°
17
76°
57°
18
68°
55°
19
72°
58°
20
77°
60°
21
77°
60°
22
78°
59°
23
78°
58°
24
76°
57°
25
75°
57°
26
75°
56°
27
76°
57°
28
75°
56°
29
73°
54°
30
68°
54°
1
67°
53°
2
72°
55°
3
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lockport
Lockport's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 53° and 69°. The average high for September is 75° with an average low of 58°. 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 Lockport. See also: October | November | December.
