S
M
T
W
T
F
S
30
89°
52°
31
88°
52°
1
87°
50°
2
86°
47°
3
85°
47°
4
83°
46°
5
78°
40°
6
77°
47°
7
79°
46°
8
84°
49°
9
85°
49°
10
75°
41°
11
73°
43°
12
75°
44°
13
82°
47°
14
84°
48°
15
85°
44°
16
77°
38°
17
73°
41°
18
79°
41°
19
81°
42°
20
Hist. Avg.
76°
40°
21
Hist. Avg.
76°
40°
22
Hist. Avg.
76°
40°
23
Hist. Avg.
75°
39°
24
Hist. Avg.
75°
39°
25
Hist. Avg.
74°
39°
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 73° to 89°, with overnight lows between 38° and 52°. The average high for September is 81° with an average low of 45°. 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.
