S
M
T
W
T
F
S
30
89°
55°
31
89°
54°
1
90°
54°
2
88°
53°
3
88°
53°
4
85°
51°
5
83°
49°
6
81°
48°
7
84°
52°
8
87°
54°
9
88°
52°
10
86°
44°
11
78°
52°
12
84°
51°
13
85°
52°
14
86°
53°
15
87°
50°
16
85°
42°
17
74°
47°
18
83°
48°
19
74°
40°
20
83°
47°
21
83°
47°
22
Hist. Avg.
77°
49°
23
Hist. Avg.
76°
48°
24
Hist. Avg.
76°
48°
25
Hist. Avg.
75°
48°
26
Hist. Avg.
75°
47°
27
Hist. Avg.
74°
47°
28
Hist. Avg.
74°
47°
29
Hist. Avg.
73°
46°
30
Hist. Avg.
73°
46°
1
Hist. Avg.
72°
46°
2
Hist. Avg.
72°
46°
3
Hist. Avg.
71°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Pendleton
Pendleton's September 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 40° and 55°. The average high for September is 84° with an average low of 50°. 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.
