S
M
T
W
T
F
S
30
60°
51°
31
72°
38°
1
80°
52°
2
71°
48°
3
66°
49°
4
68°
47°
5
71°
46°
6
73°
47°
7
72°
46°
8
72°
47°
9
74°
48°
10
75°
45°
11
79°
49°
12
77°
47°
13
73°
48°
14
74°
43°
15
77°
45°
16
68°
44°
17
66°
44°
18
66°
38°
19
65°
45°
20
65°
42°
21
64°
37°
22
64°
36°
23
65°
37°
24
63°
36°
25
63°
35°
26
68°
39°
27
71°
44°
28
63°
43°
29
62°
38°
30
69°
42°
1
67°
43°
2
61°
42°
3
61°
41°
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 61° to 80°, with overnight lows between 35° and 52°. The average high for September is 69° 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 Cle Elum. See also: October | November | December.
