S
M
T
W
T
F
S
26
70°
56°
27
69°
54°
28
69°
56°
29
66°
56°
30
65°
54°
31
65°
54°
1
66°
52°
2
65°
51°
3
66°
54°
4
67°
57°
5
68°
57°
6
66°
56°
7
65°
55°
8
64°
54°
9
65°
56°
10
65°
54°
11
69°
56°
12
69°
56°
13
68°
55°
14
69°
56°
15
69°
56°
16
68°
55°
17
69°
55°
18
67°
52°
19
64°
50°
20
64°
50°
21
65°
49°
22
64°
51°
23
64°
53°
24
65°
50°
25
63°
51°
26
63°
54°
27
64°
54°
28
63°
51°
29
64°
51°
30
63°
50°
31
62°
49°
1
64°
50°
2
66°
51°
3
66°
53°
4
65°
49°
5
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Defynnog
Defynnog's August 2026 forecast shows daily high temperatures ranging from 62° to 70°, with overnight lows between 48° and 57°. The average high for August is 66° 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 Defynnog. See also: September | October | November.