S
M
T
W
T
F
S
30
86°
51°
31
85°
52°
1
87°
53°
2
86°
52°
3
87°
53°
4
87°
52°
5
86°
50°
6
87°
48°
7
86°
50°
8
84°
52°
9
83°
50°
10
75°
44°
11
73°
41°
12
73°
40°
13
74°
41°
14
77°
47°
15
73°
36°
16
70°
38°
17
71°
47°
18
72°
47°
19
73°
48°
20
81°
43°
21
74°
37°
22
69°
36°
23
68°
38°
24
70°
42°
25
73°
46°
26
77°
46°
27
78°
47°
28
79°
45°
29
77°
35°
30
67°
38°
1
71°
41°
2
70°
35°
3
63°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tieton
Tieton's September 2026 forecast shows daily high temperatures ranging from 63° to 87°, with overnight lows between 31° and 53°. The average high for September is 77° with an average low of 44°. 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 Tieton. See also: October | November | December.
