S
M
T
W
T
F
S
26
97°
75°
27
98°
74°
28
97°
73°
29
98°
75°
30
99°
76°
31
98°
76°
1
98°
76°
2
97°
75°
3
99°
76°
4
99°
77°
5
98°
76°
6
97°
76°
7
98°
75°
8
98°
76°
9
97°
75°
10
93°
75°
11
95°
74°
12
95°
74°
13
98°
75°
14
97°
74°
15
94°
73°
16
94°
74°
17
93°
73°
18
93°
74°
19
94°
74°
20
95°
75°
21
95°
74°
22
96°
75°
23
96°
75°
24
94°
74°
25
94°
75°
26
95°
73°
27
91°
73°
28
94°
72°
29
93°
69°
30
94°
70°
31
96°
69°
1
95°
70°
2
93°
71°
3
95°
71°
4
97°
70°
5
96°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castroville
Castroville's August 2026 forecast shows daily high temperatures ranging from 91° to 99°, with overnight lows between 69° and 77°. The average high for August is 96° with an average low of 74°. 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 Castroville. See also: September | October | November.
