S
M
T
W
T
F
S
30
81°
61°
31
78°
59°
1
77°
60°
2
77°
62°
3
81°
65°
4
80°
57°
5
81°
57°
6
74°
58°
7
74°
58°
8
76°
57°
9
75°
56°
10
78°
56°
11
77°
54°
12
73°
54°
13
72°
55°
14
73°
54°
15
74°
55°
16
77°
56°
17
78°
59°
18
78°
60°
19
78°
52°
20
79°
51°
21
71°
52°
22
69°
51°
23
Hist. Avg.
76°
54°
24
Hist. Avg.
76°
54°
25
Hist. Avg.
75°
54°
26
Hist. Avg.
75°
53°
27
Hist. Avg.
74°
53°
28
Hist. Avg.
74°
52°
29
Hist. Avg.
74°
52°
30
Hist. Avg.
73°
52°
1
Hist. Avg.
73°
51°
2
Hist. Avg.
72°
51°
3
Hist. Avg.
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lee's Summit
Lee's Summit's September 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 51° and 65°. The average high for September is 76° with an average low of 57°. 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 Lee's Summit. See also: October | November | December.
