S
M
T
W
T
F
S
26
83°
59°
27
87°
61°
28
83°
61°
29
82°
59°
30
87°
56°
31
89°
53°
1
81°
66°
2
71°
64°
3
82°
57°
4
84°
54°
5
84°
55°
6
86°
62°
7
81°
68°
8
87°
66°
9
84°
60°
10
85°
64°
11
85°
62°
12
79°
60°
13
84°
62°
14
82°
60°
15
77°
64°
16
76°
62°
17
82°
59°
18
80°
56°
19
83°
55°
20
77°
52°
21
77°
51°
22
80°
58°
23
71°
57°
24
72°
56°
25
76°
53°
26
76°
61°
27
73°
54°
28
70°
47°
29
74°
55°
30
76°
64°
31
79°
62°
1
70°
55°
2
67°
50°
3
69°
52°
4
70°
51°
5
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Morriston
Morriston's August 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 47° and 64°. The average high for August is 72° with an average low of 55°. 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 Morriston. See also: September | October | November.
