S
M
T
W
T
F
S
30
72°
59°
31
73°
57°
1
72°
50°
2
68°
54°
3
79°
64°
4
68°
55°
5
71°
59°
6
73°
63°
7
75°
57°
8
70°
51°
9
67°
53°
10
65°
57°
11
67°
51°
12
66°
55°
13
65°
54°
14
68°
56°
15
68°
57°
16
69°
56°
17
67°
54°
18
66°
51°
19
66°
51°
20
68°
55°
21
68°
55°
22
69°
54°
23
68°
54°
24
68°
53°
25
67°
52°
26
65°
52°
27
65°
53°
28
64°
52°
29
64°
51°
30
66°
52°
1
65°
46°
2
64°
52°
3
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St Osyth
St Osyth's September 2026 forecast shows daily high temperatures ranging from 64° to 75°, with overnight lows between 46° and 63°. The average high for September is 67° with an average low of 54°. 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 Osyth. See also: October | November | December.