S
M
T
W
T
F
S
30
64°
54°
31
63°
55°
1
65°
52°
2
64°
53°
3
65°
57°
4
66°
58°
5
65°
57°
6
66°
57°
7
64°
55°
8
63°
54°
9
62°
51°
10
Hist. Avg.
62°
52°
11
Hist. Avg.
62°
52°
12
Hist. Avg.
62°
52°
13
Hist. Avg.
62°
52°
14
Hist. Avg.
62°
52°
15
Hist. Avg.
62°
52°
16
Hist. Avg.
62°
52°
17
Hist. Avg.
62°
52°
18
Hist. Avg.
61°
51°
19
Hist. Avg.
61°
51°
20
Hist. Avg.
61°
51°
21
Hist. Avg.
61°
51°
22
Hist. Avg.
61°
51°
23
Hist. Avg.
61°
51°
24
Hist. Avg.
61°
51°
25
Hist. Avg.
60°
51°
26
Hist. Avg.
60°
50°
27
Hist. Avg.
60°
50°
28
Hist. Avg.
60°
50°
29
Hist. Avg.
60°
50°
30
Hist. Avg.
60°
50°
1
Hist. Avg.
59°
50°
2
Hist. Avg.
59°
50°
3
Hist. Avg.
59°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St Austell
St Austell's September 2026 forecast shows daily high temperatures ranging from 62° to 66°, with overnight lows between 51° and 58°. The average high for September is 64° 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 September weather will actually feel in St Austell. See also: October | November | December.
