S
M
T
W
T
F
S
26
68°
61°
27
66°
59°
28
68°
63°
29
70°
59°
30
66°
59°
31
66°
54°
1
64°
54°
2
70°
55°
3
77°
63°
4
70°
61°
5
66°
57°
6
66°
55°
7
68°
59°
8
68°
59°
9
68°
55°
10
66°
46°
11
79°
54°
12
81°
58°
13
84°
60°
14
69°
53°
15
64°
50°
16
66°
53°
17
66°
55°
18
66°
53°
19
65°
52°
20
64°
53°
21
65°
52°
22
63°
53°
23
61°
53°
24
61°
52°
25
60°
51°
26
60°
51°
27
59°
52°
28
60°
50°
29
60°
50°
30
60°
54°
31
60°
52°
1
60°
53°
2
63°
56°
3
64°
55°
4
62°
54°
5
62°
53°
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 59° to 84°, with overnight lows between 46° and 60°. The average high for August is 65° with an average low of 53°. 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.