S
M
T
W
T
F
S
26
68°
57°
27
69°
58°
28
69°
57°
29
68°
58°
30
69°
58°
31
67°
57°
1
65°
56°
2
63°
57°
3
66°
57°
4
67°
56°
5
66°
57°
6
65°
57°
7
64°
53°
8
64°
52°
9
63°
52°
10
63°
54°
11
64°
51°
12
63°
51°
13
63°
52°
14
64°
55°
15
63°
52°
16
62°
52°
17
62°
53°
18
63°
54°
19
62°
52°
20
63°
51°
21
62°
55°
22
61°
51°
23
62°
50°
24
63°
50°
25
62°
49°
26
61°
50°
27
63°
53°
28
63°
53°
29
64°
55°
30
64°
55°
31
63°
54°
1
64°
55°
2
64°
54°
3
63°
53°
4
65°
54°
5
63°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Penmachno
Penmachno's August 2026 forecast shows daily high temperatures ranging from 61° to 69°, with overnight lows between 49° and 58°. The average high for August is 64° 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 Penmachno. See also: September | October | November.