S
M
T
W
T
F
S
30
81°
60°
31
81°
62°
1
80°
63°
2
81°
59°
3
80°
53°
4
73°
51°
5
72°
57°
6
74°
62°
7
80°
61°
8
80°
60°
9
76°
53°
10
75°
59°
11
78°
58°
12
79°
60°
13
79°
60°
14
78°
59°
15
79°
56°
16
77°
54°
17
73°
55°
18
77°
50°
19
69°
48°
20
68°
47°
21
66°
46°
22
67°
55°
23
68°
50°
24
67°
46°
25
65°
45°
26
66°
53°
27
72°
54°
28
73°
51°
29
72°
48°
30
68°
50°
1
64°
49°
2
70°
44°
3
63°
45°
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 63° to 81°, with overnight lows between 44° and 63°. The average high for September is 73° 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 Lockport. See also: October | November | December.
