S
M
T
W
T
F
S
30
96°
65°
31
98°
72°
1
100°
74°
2
101°
72°
3
100°
72°
4
102°
73°
5
102°
73°
6
105°
75°
7
100°
72°
8
97°
72°
9
97°
73°
10
96°
71°
11
93°
70°
12
95°
71°
13
98°
72°
14
96°
70°
15
92°
67°
16
92°
65°
17
93°
66°
18
93°
63°
19
91°
67°
20
86°
62°
21
91°
68°
22
90°
66°
23
89°
66°
24
89°
67°
25
88°
66°
26
89°
66°
27
88°
65°
28
87°
65°
29
87°
64°
30
86°
65°
1
84°
59°
2
81°
56°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lambert
Lambert's September 2026 forecast shows daily high temperatures ranging from 75° to 100°, with overnight lows between 52° and 73°. The average high for September is 90° with an average low of 66°. 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 Lambert. See also: October | November | December.
