S
M
T
W
T
F
S
26
72°
59°
27
73°
54°
28
72°
52°
29
72°
55°
30
70°
56°
31
72°
54°
1
72°
54°
2
71°
54°
3
71°
55°
4
70°
66°
5
70°
57°
6
70°
66°
7
72°
57°
8
70°
65°
9
71°
66°
10
70°
61°
11
70°
63°
12
71°
63°
13
69°
62°
14
70°
60°
15
71°
60°
16
71°
59°
17
72°
59°
18
73°
59°
19
71°
58°
20
72°
57°
21
71°
57°
22
76°
54°
23
76°
53°
24
74°
55°
25
77°
53°
26
86°
59°
27
83°
61°
28
77°
62°
29
73°
53°
30
72°
48°
31
70°
53°
1
69°
54°
2
72°
48°
3
76°
54°
4
74°
60°
5
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arroyo Grande
Arroyo Grande's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Arroyo Grande. See also: September | October | November.
