S
M
T
W
T
F
S
30
74°
47°
31
81°
42°
1
83°
46°
2
73°
53°
3
70°
40°
4
67°
45°
5
64°
43°
6
55°
41°
7
68°
52°
8
77°
43°
9
83°
42°
10
72°
58°
11
72°
50°
12
70°
47°
13
56°
47°
14
67°
51°
15
62°
47°
16
74°
41°
17
76°
40°
18
79°
45°
19
80°
45°
20
81°
43°
21
82°
44°
22
72°
55°
23
71°
49°
24
66°
40°
25
64°
46°
26
62°
38°
27
65°
31°
28
70°
33°
29
69°
51°
30
69°
44°
1
69°
44°
2
76°
39°
3
76°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kittitas
Kittitas's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Kittitas. See also: October | November | December.
