S
M
T
W
T
F
S
30
81°
67°
31
91°
70°
1
93°
74°
2
94°
74°
3
93°
75°
4
92°
74°
5
86°
72°
6
81°
64°
7
82°
63°
8
86°
70°
9
79°
66°
10
80°
58°
11
82°
63°
12
84°
62°
13
78°
66°
14
76°
65°
15
75°
58°
16
72°
56°
17
74°
57°
18
71°
53°
19
71°
51°
20
69°
54°
21
74°
54°
22
70°
58°
23
73°
58°
24
78°
59°
25
78°
59°
26
77°
58°
27
77°
59°
28
79°
59°
29
78°
60°
30
78°
59°
1
74°
53°
2
71°
47°
3
64°
44°
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 64° to 86°, with overnight lows between 44° and 70°. The average high for September is 76° 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.
