S
M
T
W
T
F
S
26
85°
53°
27
86°
55°
28
86°
60°
29
84°
55°
30
87°
57°
31
93°
56°
1
84°
60°
2
76°
50°
3
80°
46°
4
86°
49°
5
94°
53°
6
96°
60°
7
97°
64°
8
93°
60°
9
89°
57°
10
89°
56°
11
90°
61°
12
88°
55°
13
86°
54°
14
91°
56°
15
92°
60°
16
92°
62°
17
87°
57°
18
85°
56°
19
86°
56°
20
91°
57°
21
89°
56°
22
92°
58°
23
88°
53°
24
92°
59°
25
93°
59°
26
92°
60°
27
92°
59°
28
91°
58°
29
90°
57°
30
85°
56°
31
83°
57°
1
87°
57°
2
80°
55°
3
82°
55°
4
88°
56°
5
87°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Pendleton
Pendleton's August 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 53° and 62°. The average high for August is 88° with an average low of 57°. 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.