S
M
T
W
T
F
S
30
92°
70°
31
91°
69°
1
88°
71°
2
89°
70°
3
89°
70°
4
90°
69°
5
89°
69°
6
90°
70°
7
90°
70°
8
91°
68°
9
90°
70°
10
90°
70°
11
89°
69°
12
90°
69°
13
90°
68°
14
89°
68°
15
86°
67°
16
88°
67°
17
88°
68°
18
87°
67°
19
88°
66°
20
87°
67°
21
86°
67°
22
87°
66°
23
88°
67°
24
86°
65°
25
86°
61°
26
82°
60°
27
Hist. Avg.
85°
66°
28
Hist. Avg.
85°
65°
29
Hist. Avg.
85°
65°
30
Hist. Avg.
85°
65°
1
Hist. Avg.
84°
64°
2
Hist. Avg.
84°
64°
3
Hist. Avg.
84°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Calvert
Calvert's September 2026 forecast shows daily high temperatures ranging from 82° to 92°, with overnight lows between 60° and 71°. The average high for September is 88° 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 Calvert. See also: October | November | December.