S
M
T
W
T
F
S
26
83°
62°
27
83°
53°
28
76°
55°
29
76°
55°
30
79°
61°
31
75°
55°
1
76°
56°
2
76°
61°
3
77°
53°
4
77°
54°
5
76°
53°
6
75°
52°
7
73°
54°
8
75°
51°
9
75°
59°
10
76°
60°
11
81°
58°
12
82°
58°
13
82°
60°
14
81°
60°
15
82°
59°
16
83°
59°
17
79°
52°
18
78°
51°
19
73°
52°
20
73°
55°
21
74°
58°
22
72°
58°
23
75°
59°
24
78°
58°
25
80°
50°
26
73°
50°
27
72°
48°
28
72°
49°
29
71°
49°
30
Hist. Avg.
77°
53°
31
Hist. Avg.
77°
53°
1
Hist. Avg.
76°
53°
2
Hist. Avg.
76°
52°
3
Hist. Avg.
76°
52°
4
Hist. Avg.
76°
52°
5
Hist. Avg.
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Pendleton
Pendleton's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 48° and 62°. The average high for August is 77° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Pendleton. See also: September | October | November.