S
M
T
W
T
F
S
26
64°
50°
27
59°
46°
28
N/A
29
70°
54°
30
66°
45°
31
64°
48°
1
65°
47°
2
68°
51°
3
67°
52°
4
66°
52°
5
64°
50°
6
63°
49°
7
62°
48°
8
63°
48°
9
65°
52°
10
63°
51°
11
63°
49°
12
62°
47°
13
65°
51°
14
65°
48°
15
64°
52°
16
66°
52°
17
66°
51°
18
64°
52°
19
65°
52°
20
65°
51°
21
64°
52°
22
65°
52°
23
66°
51°
24
65°
51°
25
61°
50°
26
61°
51°
27
63°
50°
28
61°
50°
29
63°
48°
30
63°
51°
31
64°
47°
1
60°
46°
2
59°
47°
3
59°
48°
4
60°
48°
5
59°
47°
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 59° to 70°, with overnight lows between 45° and 54°. 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.