S
M
T
W
T
F
S
30
91°
68°
31
91°
67°
1
90°
67°
2
90°
68°
3
89°
69°
4
88°
67°
5
90°
63°
6
89°
58°
7
82°
58°
8
81°
60°
9
82°
62°
10
86°
65°
11
87°
62°
12
87°
61°
13
85°
65°
14
86°
63°
15
86°
61°
16
83°
60°
17
84°
63°
18
85°
62°
19
85°
61°
20
84°
57°
21
82°
61°
22
77°
61°
23
75°
57°
24
77°
61°
25
77°
57°
26
80°
55°
27
76°
54°
28
75°
56°
29
75°
53°
30
73°
56°
1
73°
62°
2
80°
60°
3
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Caswell
Caswell's September 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 53° and 69°. The average high for September is 83° with an average low of 61°. 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 Caswell. See also: October | November | December.