S
M
T
W
T
F
S
30
86°
65°
31
88°
70°
1
91°
75°
2
95°
73°
3
90°
70°
4
83°
69°
5
81°
63°
6
81°
58°
7
81°
61°
8
86°
69°
9
89°
71°
10
74°
59°
11
79°
56°
12
81°
64°
13
83°
67°
14
83°
68°
15
82°
64°
16
75°
57°
17
73°
55°
18
70°
54°
19
67°
51°
20
71°
54°
21
69°
53°
22
71°
58°
23
72°
58°
24
76°
57°
25
77°
58°
26
78°
57°
27
75°
56°
28
77°
58°
29
77°
58°
30
78°
57°
1
77°
57°
2
74°
51°
3
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calcutta
Calcutta's September 2026 forecast shows daily high temperatures ranging from 67° to 89°, with overnight lows between 47° and 71°. The average high for September is 76° with an average low of 58°. 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 Calcutta. See also: October | November | December.
