S
M
T
W
T
F
S
30
84°
61°
31
80°
69°
1
92°
72°
2
78°
69°
3
86°
69°
4
87°
69°
5
81°
63°
6
79°
60°
7
78°
56°
8
83°
54°
9
91°
70°
10
84°
65°
11
81°
58°
12
74°
68°
13
81°
64°
14
83°
63°
15
87°
65°
16
83°
59°
17
79°
57°
18
78°
57°
19
71°
51°
20
70°
52°
21
72°
51°
22
72°
51°
23
74°
56°
24
74°
55°
25
69°
47°
26
70°
51°
27
77°
54°
28
78°
53°
29
72°
48°
30
76°
54°
1
75°
52°
2
73°
48°
3
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carlisle
Carlisle's September 2026 forecast shows daily high temperatures ranging from 69° to 91°, with overnight lows between 47° and 70°. The average high for September is 77° with an average low of 56°. 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 Carlisle. See also: October | November | December.