S
M
T
W
T
F
S
30
87°
52°
31
88°
54°
1
89°
53°
2
88°
53°
3
88°
46°
4
86°
49°
5
86°
52°
6
85°
49°
7
87°
48°
8
85°
41°
9
76°
43°
10
76°
37°
11
79°
40°
12
79°
39°
13
73°
38°
14
73°
35°
15
74°
34°
16
75°
37°
17
74°
41°
18
72°
39°
19
73°
40°
20
73°
39°
21
75°
38°
22
75°
36°
23
79°
39°
24
74°
41°
25
77°
40°
26
Hist. Avg.
74°
38°
27
Hist. Avg.
74°
38°
28
Hist. Avg.
73°
38°
29
Hist. Avg.
72°
38°
30
Hist. Avg.
72°
37°
1
Hist. Avg.
72°
37°
2
Hist. Avg.
71°
37°
3
Hist. Avg.
70°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Leavenworth
Leavenworth's September 2026 forecast shows daily high temperatures ranging from 72° to 89°, with overnight lows between 34° and 54°. The average high for September is 79° with an average low of 43°. 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.
