S
M
T
W
T
F
S
26
86°
57°
27
87°
58°
28
80°
53°
29
77°
52°
30
78°
52°
31
78°
54°
1
79°
54°
2
83°
56°
3
82°
50°
4
79°
52°
5
81°
55°
6
86°
54°
7
82°
52°
8
79°
51°
9
78°
53°
10
80°
55°
11
84°
55°
12
88°
60°
13
89°
59°
14
87°
56°
15
85°
59°
16
87°
55°
17
86°
53°
18
84°
55°
19
81°
52°
20
77°
53°
21
76°
48°
22
75°
47°
23
74°
48°
24
76°
51°
25
78°
54°
26
83°
56°
27
84°
57°
28
83°
58°
29
83°
56°
30
82°
56°
31
84°
55°
1
84°
58°
2
83°
53°
3
81°
53°
4
78°
51°
5
74°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Penticton
Penticton's August 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 45° and 60°. The average high for August is 81° with an average low of 54°. 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 Penticton. See also: September | October | November.
