S
M
T
W
T
F
S
26
82°
66°
27
84°
70°
28
81°
68°
29
81°
68°
30
84°
63°
31
88°
66°
1
79°
70°
2
79°
70°
3
79°
63°
4
81°
59°
5
85°
67°
6
83°
68°
7
83°
69°
8
84°
66°
9
83°
70°
10
85°
71°
11
82°
69°
12
80°
66°
13
79°
67°
14
77°
66°
15
77°
68°
16
79°
65°
17
78°
66°
18
79°
66°
19
85°
70°
20
82°
69°
21
82°
69°
22
83°
70°
23
84°
70°
24
83°
69°
25
81°
70°
26
81°
70°
27
80°
69°
28
79°
68°
29
80°
69°
30
79°
68°
31
80°
68°
1
82°
67°
2
76°
64°
3
74°
64°
4
76°
66°
5
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Castalia
Castalia's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 64° and 71°. The average high for August is 81° with an average low of 68°. 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 Castalia. See also: September | October | November.
