S
M
T
W
T
F
S
30
92°
73°
31
91°
70°
1
90°
69°
2
90°
70°
3
89°
68°
4
92°
70°
5
90°
70°
6
91°
68°
7
Hist. Avg.
88°
63°
8
Hist. Avg.
88°
63°
9
Hist. Avg.
88°
62°
10
Hist. Avg.
87°
62°
11
Hist. Avg.
87°
62°
12
Hist. Avg.
86°
61°
13
Hist. Avg.
86°
61°
14
Hist. Avg.
86°
60°
15
Hist. Avg.
85°
60°
16
Hist. Avg.
85°
59°
17
Hist. Avg.
84°
59°
18
Hist. Avg.
84°
58°
19
Hist. Avg.
84°
58°
20
Hist. Avg.
83°
58°
21
Hist. Avg.
83°
57°
22
Hist. Avg.
82°
57°
23
Hist. Avg.
82°
56°
24
Hist. Avg.
82°
56°
25
Hist. Avg.
81°
56°
26
Hist. Avg.
81°
55°
27
Hist. Avg.
81°
55°
28
Hist. Avg.
80°
54°
29
Hist. Avg.
80°
54°
30
Hist. Avg.
80°
54°
1
Hist. Avg.
79°
53°
2
Hist. Avg.
79°
53°
3
Hist. Avg.
79°
52°
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 89° to 92°, with overnight lows between 68° and 73°. The average high for September is 91° with an average low of 70°. 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.
