S
M
T
W
T
F
S
30
86°
66°
31
81°
68°
1
80°
72°
2
80°
72°
3
87°
71°
4
87°
73°
5
86°
71°
6
84°
68°
7
86°
71°
8
83°
65°
9
79°
64°
10
78°
63°
11
78°
64°
12
81°
63°
13
80°
69°
14
83°
65°
15
78°
62°
16
77°
64°
17
76°
63°
18
77°
67°
19
81°
61°
20
81°
65°
21
79°
66°
22
82°
60°
23
77°
60°
24
74°
59°
25
74°
59°
26
75°
65°
27
78°
65°
28
78°
64°
29
79°
58°
30
76°
58°
1
71°
64°
2
77°
64°
3
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cliffs of Calvert
Cliffs of Calvert's September 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 58° and 73°. The average high for September is 80° with an average low of 65°. 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 Cliffs of Calvert. See also: October | November | December.