S
M
T
W
T
F
S
26
65°
59°
27
66°
58°
28
68°
59°
29
68°
60°
30
69°
61°
31
69°
60°
1
68°
60°
2
70°
59°
3
68°
58°
4
67°
60°
5
70°
58°
6
70°
60°
7
69°
59°
8
67°
60°
9
65°
59°
10
66°
56°
11
67°
57°
12
66°
59°
13
66°
59°
14
65°
58°
15
67°
60°
16
69°
60°
17
69°
59°
18
68°
58°
19
69°
58°
20
66°
60°
21
68°
59°
22
68°
58°
23
67°
57°
24
66°
58°
25
65°
58°
26
66°
57°
27
65°
56°
28
64°
58°
29
64°
58°
30
65°
59°
31
67°
59°
1
67°
58°
2
68°
59°
3
68°
59°
4
67°
58°
5
68°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St Austell
St Austell's August 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 56° and 61°. The average high for August is 67° with an average low of 59°. 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 St Austell. See also: September | October | November.
