S
M
T
W
T
F
S
30
97°
76°
31
97°
73°
1
97°
70°
2
97°
70°
3
96°
72°
4
96°
72°
5
98°
73°
6
97°
72°
7
91°
73°
8
97°
75°
9
84°
72°
10
84°
68°
11
85°
66°
12
79°
62°
13
80°
61°
14
93°
60°
15
94°
67°
16
89°
69°
17
93°
70°
18
92°
72°
19
90°
68°
20
80°
64°
21
75°
58°
22
76°
60°
23
78°
58°
24
79°
57°
25
80°
60°
26
79°
59°
27
80°
60°
28
78°
53°
29
74°
60°
30
73°
60°
1
78°
59°
2
79°
60°
3
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Leavenworth
Leavenworth's September 2026 forecast shows daily high temperatures ranging from 73° to 94°, with overnight lows between 53° and 72°. The average high for September is 81° with an average low of 62°. 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 Leavenworth. See also: October | November | December.
