S
M
T
W
T
F
S
30
85°
56°
31
83°
57°
1
87°
57°
2
80°
55°
3
82°
55°
4
88°
56°
5
87°
55°
6
88°
56°
7
87°
55°
8
85°
54°
9
87°
55°
10
81°
52°
11
76°
50°
12
76°
50°
13
74°
45°
14
74°
42°
15
75°
44°
16
76°
48°
17
82°
53°
18
74°
51°
19
73°
47°
20
74°
50°
21
75°
42°
22
74°
41°
23
74°
42°
24
77°
45°
25
78°
48°
26
79°
41°
27
71°
35°
28
67°
35°
29
66°
33°
30
65°
37°
1
68°
41°
2
73°
39°
3
72°
41°
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 65° to 88°, with overnight lows between 33° and 57°. The average high for September is 78° with an average low of 48°. 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.
