S
M
T
W
T
F
S
30
77°
67°
31
80°
70°
1
82°
70°
2
82°
71°
3
81°
70°
4
82°
69°
5
82°
69°
6
81°
68°
7
77°
68°
8
78°
65°
9
76°
66°
10
75°
67°
11
74°
68°
12
75°
70°
13
77°
69°
14
76°
66°
15
75°
63°
16
80°
63°
17
81°
67°
18
81°
68°
19
Hist. Avg.
77°
66°
20
Hist. Avg.
77°
66°
21
Hist. Avg.
77°
66°
22
Hist. Avg.
77°
66°
23
Hist. Avg.
77°
66°
24
Hist. Avg.
76°
65°
25
Hist. Avg.
76°
65°
26
Hist. Avg.
76°
65°
27
Hist. Avg.
76°
65°
28
Hist. Avg.
76°
65°
29
Hist. Avg.
76°
65°
30
Hist. Avg.
76°
64°
1
Hist. Avg.
76°
64°
2
Hist. Avg.
76°
64°
3
Hist. Avg.
76°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Castle
Castle's September 2026 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 63° and 71°. The average high for September is 79° with an average low of 68°. 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. See also: October | November | December.
