S
M
T
W
T
F
S
30
92°
74°
31
91°
76°
1
92°
76°
2
92°
75°
3
91°
76°
4
92°
75°
5
91°
74°
6
92°
74°
7
91°
71°
8
87°
71°
9
88°
72°
10
91°
72°
11
90°
70°
12
90°
73°
13
89°
72°
14
90°
73°
15
89°
72°
16
88°
72°
17
89°
69°
18
89°
71°
19
85°
72°
20
88°
67°
21
85°
67°
22
83°
66°
23
83°
69°
24
84°
70°
25
84°
70°
26
87°
69°
27
87°
70°
28
86°
70°
29
86°
69°
30
83°
67°
1
85°
68°
2
86°
63°
3
82°
64°
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 82° to 92°, with overnight lows between 63° and 76°. The average high for September is 88° 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.
