S
M
T
W
T
F
S
30
56°
42°
31
69°
44°
1
66°
45°
2
55°
38°
3
49°
40°
4
50°
39°
5
55°
43°
6
66°
38°
7
64°
37°
8
65°
38°
9
68°
40°
10
69°
36°
11
72°
40°
12
71°
40°
13
68°
37°
14
67°
34°
15
70°
36°
16
61°
35°
17
60°
35°
18
60°
29°
19
61°
36°
20
59°
33°
21
58°
28°
22
58°
27°
23
57°
28°
24
56°
27°
25
57°
27°
26
62°
30°
27
65°
36°
28
57°
35°
29
56°
29°
30
63°
33°
1
62°
35°
2
55°
34°
3
55°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Leavenworth-Lake Wenatchee
Leavenworth-Lake Wenatchee's September 2026 forecast shows daily high temperatures ranging from 49° to 72°, with overnight lows between 27° and 45°. The average high for September is 61° with an average low of 35°. 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-Lake Wenatchee. See also: October | November | December.
