S
M
T
W
T
F
S
30
71°
42°
31
73°
47°
1
75°
50°
2
81°
46°
3
83°
50°
4
81°
41°
5
71°
42°
6
72°
47°
7
77°
46°
8
70°
41°
9
69°
44°
10
68°
45°
11
69°
44°
12
68°
42°
13
68°
41°
14
70°
42°
15
74°
46°
16
77°
39°
17
72°
38°
18
71°
39°
19
76°
42°
20
75°
46°
21
72°
39°
22
66°
38°
23
65°
39°
24
65°
35°
25
64°
36°
26
65°
34°
27
64°
43°
28
64°
42°
29
63°
37°
30
64°
39°
1
67°
43°
2
67°
40°
3
65°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cle Elum
Cle Elum's September 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 34° and 50°. The average high for September is 70° with an average low of 42°. 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 Cle Elum. See also: October | November | December.
