S
M
T
W
T
F
S
26
64°
50°
27
59°
46°
28
N/A
29
70°
55°
30
66°
46°
31
63°
49°
1
65°
48°
2
68°
49°
3
64°
51°
4
64°
50°
5
64°
50°
6
63°
49°
7
62°
49°
8
63°
51°
9
66°
52°
10
65°
53°
11
63°
49°
12
68°
51°
13
67°
50°
14
68°
52°
15
68°
52°
16
67°
53°
17
67°
52°
18
66°
52°
19
64°
51°
20
63°
52°
21
62°
49°
22
61°
47°
23
61°
50°
24
62°
50°
25
63°
51°
26
64°
50°
27
63°
50°
28
61°
49°
29
62°
50°
30
61°
50°
31
60°
46°
1
59°
46°
2
60°
47°
3
59°
46°
4
59°
45°
5
58°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Penrith
Penrith's August 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 45° and 55°. The average high for August is 64° 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 August weather will actually feel in Penrith. See also: September | October | November.