S
M
T
W
T
F
S
30
88°
79°
31
88°
77°
1
88°
79°
2
88°
75°
3
91°
75°
4
90°
77°
5
90°
75°
6
91°
73°
7
91°
74°
8
89°
75°
9
86°
74°
10
88°
73°
11
89°
73°
12
89°
74°
13
89°
75°
14
90°
72°
15
89°
70°
16
91°
72°
17
90°
72°
18
90°
72°
19
89°
73°
20
85°
69°
21
88°
73°
22
89°
73°
23
88°
72°
24
88°
72°
25
87°
71°
26
87°
72°
27
86°
71°
28
85°
71°
29
84°
70°
30
84°
71°
1
85°
66°
2
80°
63°
3
79°
63°
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 79° to 91°, with overnight lows between 63° and 75°. The average high for September is 87° with an average low of 71°. 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.
