S
M
T
W
T
F
S
30
56°
42°
31
69°
44°
1
61°
48°
2
63°
38°
3
50°
38°
4
50°
39°
5
51°
37°
6
57°
37°
7
68°
37°
8
68°
38°
9
68°
37°
10
74°
40°
11
71°
38°
12
64°
36°
13
66°
37°
14
68°
38°
15
67°
34°
16
61°
35°
17
60°
35°
18
59°
30°
19
60°
30°
20
63°
38°
21
60°
34°
22
60°
34°
23
58°
29°
24
57°
28°
25
57°
26°
26
60°
29°
27
66°
34°
28
66°
35°
29
65°
35°
30
66°
34°
1
65°
35°
2
66°
35°
3
65°
34°
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 50° to 74°, with overnight lows between 26° and 40°. The average high for September is 62° 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.
