S
M
T
W
T
F
S
30
95°
65°
31
96°
72°
1
101°
75°
2
97°
75°
3
98°
75°
4
99°
74°
5
96°
75°
6
98°
74°
7
98°
76°
8
99°
73°
9
98°
76°
10
96°
75°
11
90°
70°
12
90°
67°
13
91°
68°
14
87°
65°
15
82°
69°
16
84°
68°
17
85°
68°
18
88°
67°
19
89°
68°
20
88°
68°
21
87°
67°
22
88°
67°
23
88°
66°
24
87°
66°
25
88°
65°
26
89°
66°
27
88°
65°
28
88°
66°
29
87°
65°
30
88°
65°
1
87°
64°
2
87°
65°
3
86°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pendleton
Pendleton's September 2026 forecast shows daily high temperatures ranging from 82° to 101°, with overnight lows between 64° and 76°. The average high for September is 91° with an average low of 69°. 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 Pendleton. See also: October | November | December.
