S
M
T
W
T
F
S
30
65°
59°
31
67°
58°
1
68°
58°
2
68°
57°
3
67°
57°
4
68°
58°
5
66°
58°
6
67°
57°
7
67°
58°
8
66°
57°
9
66°
54°
10
65°
52°
11
65°
56°
12
64°
56°
13
65°
54°
14
63°
55°
15
64°
54°
16
64°
55°
17
64°
52°
18
62°
56°
19
63°
55°
20
64°
56°
21
65°
54°
22
64°
55°
23
60°
52°
24
61°
55°
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 60° to 68°, with overnight lows between 52° and 59°. The average high for September is 65° with an average low of 56°. 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.
