S
M
T
W
T
F
S
30
67°
51°
31
67°
54°
1
66°
55°
2
69°
52°
3
67°
50°
4
66°
52°
5
66°
54°
6
67°
52°
7
69°
53°
8
67°
51°
9
68°
51°
10
69°
50°
11
65°
53°
12
66°
49°
13
68°
52°
14
68°
51°
15
67°
47°
16
65°
49°
17
65°
47°
18
67°
49°
19
67°
53°
20
66°
53°
21
67°
52°
22
66°
52°
23
65°
50°
24
64°
51°
25
64°
51°
26
63°
50°
27
64°
51°
28
65°
50°
29
65°
48°
30
62°
48°
1
Hist. Avg.
61°
47°
2
Hist. Avg.
61°
47°
3
Hist. Avg.
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Castle Cary
Castle Cary's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 47° and 55°. The average high for September is 66° with an average low of 51°. 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 Castle Cary. See also: October | November | December.
