Kolkata weather in September

In September, Kolkata sees average daytime highs of 32°C and overnight lows near 26°C, with 250 mm of rain across 24.9 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 9% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Kolkata's 10th-clearest and 7th-windiest month. For the whole year in context, see Kolkata's year-round climate.

Daytime high: 32°; 6th warmest
Overnight low: 26°; 8th coldest
Rainfall: 250 mm; 24.9 wet days
Daylight: 12 h 06 min; 5:27 AM – 5:35 PM
Cloud cover: 83%; 10th clearest
Wind: 8 km/h; 7th windiest
Solar energy: 4.01 kWh/m²
Travel score: 2.5; out of 10

Kolkata is capital city of West Bengal, India.

Air quality: Severe; PM2.5 55.8 µg/m³ · 2019
Density: 22,474/km²; people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Kolkata year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Kolkata reaches about 32°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	27	27	27	27	27	27	27	27	27	27	27	27	27	27	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26

	Avg high (°C)	Avg low (°C)
1	32	27
2	32	27
3	32	27
4	32	27
5	32	27
6	32	27
7	32	27
8	32	27
9	32	27
10	32	27
11	32	27
12	32	27
13	32	27
14	32	27
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

How September really feels in Kolkata

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

30 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kolkata weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	26° / 14°	13	1.7	10.8	8.9
Feb	29° / 17°	24	2.7	11.2	7.1
Mar	33° / 22°	30	4.3	11.8	4.3
Apr	35° / 26°	68	8.8	12.5	2.6
May	35° / 27°	122	11.7	13.1	2.3
Jun	33° / 27°	265	21.9	13.4	2.2
Jul	32° / 27°	348	28.8	13.2	2.2
Aug	32° / 27°	308	29.3	12.8	2.2
Sep	32° / 26°	250	24.9	12.1	2.5
Oct	31° / 24°	131	12.9	11.5	4.3
Nov	29° / 19°	29	2.2	10.9	6.8
Dec	26° / 15°	10	1	10.6	8.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 83%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	5	6	6	7	8	9	9	10	11	12	13	14	14	15	16	16	16	17	18	19	20	22	23	25	27	29	30	33	34	36
Cloudier (%)	95	94	94	93	92	91	91	90	89	88	87	86	86	85	84	84	84	83	82	81	80	78	77	75	73	71	70	67	66	64

	Clearer (%)	Cloudier (%)
1	5	95
2	6	94
3	6	94
4	7	93
5	8	92
6	9	91
7	9	91
8	10	90
9	11	89
10	12	88
11	13	87
12	14	86
13	14	86
14	15	85
15	16	84
16	16	84
17	16	84
18	17	83
19	18	82
20	19	81
21	20	80
22	22	78
23	23	77
24	25	75
25	27	73
26	29	71
27	30	70
28	33	67
29	34	66
30	36	64

Chance of precipitation in September

Any precipitation

Kolkata gets around 250 mm of rain over 24.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 83% and peaks near 92% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	92	92	91	91	91	90	90	89	89	88	88	87	87	86	86	85	84	83	82	81	80	78	77	75	74	73	72	70	69	68

	Rain chance (%)
1	92
2	92
3	91
4	91
5	91
6	90
7	90
8	89
9	89
10	88
11	88
12	87
13	87
14	86
15	86
16	85
17	84
18	83
19	82
20	81
21	80
22	78
23	77
24	75
25	74
26	73
27	72
28	70
29	69
30	68

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2
Miserable (%)	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	98	98	98	98

	Oppressive (%)	Miserable (%)
1	0	100
2	0	100
3	0	100
4	0	100
5	0	100
6	0	100
7	0	100
8	0	100
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	2	98
28	2	98
29	2	98
30	2	98

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	8	calm
17	8	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 5:23 AM to 5:31 AM, and sunset from 5:50 PM to 5:20 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.5	12.4	12.4	12.4	12.4	12.3	12.3	12.3	12.3	12.3	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.8	11.8
Sunrise (AM)	5:23	5:23	5:23	5:23	5:24	5:24	5:24	5:25	5:25	5:25	5:26	5:26	5:26	5:26	5:27	5:27	5:27	5:28	5:28	5:28	5:29	5:29	5:29	5:29	5:30	5:30	5:30	5:31	5:31	5:31
Sunset (PM)	5:50	5:49	5:48	5:47	5:46	5:45	5:44	5:43	5:42	5:41	5:40	5:39	5:38	5:37	5:36	5:35	5:34	5:33	5:32	5:31	5:30	5:28	5:27	5:26	5:25	5:24	5:23	5:22	5:21	5:20

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.5	5:23	5:50
2	12.4	5:23	5:49
3	12.4	5:23	5:48
4	12.4	5:23	5:47
5	12.4	5:24	5:46
6	12.3	5:24	5:45
7	12.3	5:24	5:44
8	12.3	5:25	5:43
9	12.3	5:25	5:42
10	12.3	5:25	5:41
11	12.2	5:26	5:40
12	12.2	5:26	5:39
13	12.2	5:26	5:38
14	12.2	5:26	5:37
15	12.2	5:27	5:36
16	12.1	5:27	5:35
17	12.1	5:27	5:34
18	12.1	5:28	5:33
19	12.1	5:28	5:32
20	12.0	5:28	5:31
21	12.0	5:29	5:30
22	12.0	5:29	5:28
23	12.0	5:29	5:27
24	11.9	5:29	5:26
25	11.9	5:30	5:25
26	11.9	5:30	5:24
27	11.9	5:30	5:23
28	11.9	5:31	5:22
29	11.8	5:31	5:21
30	11.8	5:31	5:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.01 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 6.32 kWh/m² in April across the year — September's 4.01 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.9	3.9	3.9	3.9	3.9	3.9	3.9	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.2	4.2	4.2	4.2
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	3.9	Moderate
4	3.9	Moderate
5	3.9	Moderate
6	3.9	Moderate
7	3.9	Moderate
8	4.0	Moderate
9	4.0	Moderate
10	4.0	Moderate
11	4.0	Moderate
12	4.0	Moderate
13	4.0	Moderate
14	4.0	Moderate
15	4.0	Bright
16	4.0	Bright
17	4.0	Bright
18	4.0	Bright
19	4.0	Bright
20	4.1	Bright
21	4.1	Bright
22	4.1	Bright
23	4.1	Bright
24	4.1	Bright
25	4.1	Bright
26	4.1	Bright
27	4.2	Bright
28	4.2	Bright
29	4.2	Bright
30	4.2	Bright

Planning a trip in September

Hazard calendar for Kolkata

In seasonPeak

In September, Kolkata sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.

Kolkata sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Kolkata's monsoon runs June–September, when most of the year's rain falls.

Cyclone

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Kolkata?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.5

Sightseeing

8th-best month of the year

4.1

Beach & pool

10th-best month of the year

September is a weaker month for outdoor sightseeing in Kolkata.

What to pack for Kolkata in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Kolkata sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. About 25 days see rain.

light clothesrain gear

UV index in Kolkata in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kolkata peaks around July 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 15 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	5	8	8	10	8	13	10	11	5	5	5
Level	Moderate	High	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Moderate	High	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	5	High
Mar	8	Very high
Apr	8	Very high
May	10	Very high
Jun	8	Very high
Jul	13	Extreme
Aug	10	Extreme
Sep	11	Extreme
Oct	5	Moderate
Nov	5	High
Dec	5	Moderate

Air quality in Kolkata in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Kolkata is worst in January — around 112 µg/m³ PM2.5 (unhealthy), about 6.8× the cleanest month (July, 17 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Kolkata's WHO annual average of 55.8 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	112	91	58	30	22	19	17	21	28	58	103	111
Level	Unhealthy	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Unhealthy	Unhealthy	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	112	Unhealthy
Feb	91	Unhealthy
Mar	58	Unhealthy
Apr	30	Moderate
May	22	Moderate
Jun	19	Moderate
Jul	17	Moderate
Aug	21	Moderate
Sep	28	Moderate
Oct	58	Unhealthy
Nov	103	Unhealthy
Dec	111	Unhealthy

Location & terrain

Where is Kolkata?

Kolkata sits at 22.6°N, 88.4°E, 11 m above sea level, in India. The nearest listed city is Jessore, 110 km away.

Topography around Kolkata

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kolkata.

Within 3 km, the terrain around Kolkata has only modest variations in elevation — a maximum elevation change of 24 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 34 m; within 80 km, only modest variations in elevation — a maximum elevation change of 39 m.

The land around Kolkata is covered by artificial surfaces (75%) within 3 km, artificial surfaces (42%) and trees (39%) within 16 km, and cropland (50%) and trees (33%) within 80 km.

3 km

24 m

artificial surfaces 75%

16 km

34 m

artificial surfaces 42%

80 km

39 m

cropland 50%

treesgrasslandcroplandartificial surfaceswatermangroves

← August Kolkata year-round climate October →Best places to visit in September

September weather nearby: Jessore 110 km · Khulna 126 km · Bagerhat 147 km · Rajshahi 203 km · Barisal 207 km · Dhaka 245 km · Paharpur 281 km · Mymensingh 321 km

India travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / D / M; 230 V · 50 Hz
Prices: ≈ 23% of US; price level, 2025
GDP per capita: $2,702; 2025
Happiness: 4.5 / 10; World Happiness, 2025
Safe drinking water: 76%; of population, 2024
Homicide rate: 2.8; per 100k, 2022
Road deaths: 15.6; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Low; EF EPI 484
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Kolkata (22.5626°, 88.363°, elevation 11 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	32	27
2	32	27
3	32	27
4	32	27
5	32	27
6	32	27
7	32	27
8	32	27
9	32	27
10	32	27
11	32	27
12	32	27
13	32	27
14	32	27
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	5	95
2	6	94
3	6	94
4	7	93
5	8	92
6	9	91
7	9	91
8	10	90
9	11	89
10	12	88
11	13	87
12	14	86
13	14	86
14	15	85
15	16	84
16	16	84
17	16	84
18	17	83
19	18	82
20	19	81
21	20	80
22	22	78
23	23	77
24	25	75
25	27	73
26	29	71
27	30	70
28	33	67
29	34	66
30	36	64

	Rain chance (%)
1	92
2	92
3	91
4	91
5	91
6	90
7	90
8	89
9	89
10	88
11	88
12	87
13	87
14	86
15	86
16	85
17	84
18	83
19	82
20	81
21	80
22	78
23	77
24	75
25	74
26	73
27	72
28	70
29	69
30	68

	Oppressive (%)	Miserable (%)
1	0	100
2	0	100
3	0	100
4	0	100
5	0	100
6	0	100
7	0	100
8	0	100
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	2	98
28	2	98
29	2	98
30	2	98

	Avg high (°C)	Avg low (°C)
1	32	27
2	32	27
3	32	27
4	32	27
5	32	27
6	32	27
7	32	27
8	32	27
9	32	27
10	32	27
11	32	27
12	32	27
13	32	27
14	32	27
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	5	95
2	6	94
3	6	94
4	7	93
5	8	92
6	9	91
7	9	91
8	10	90
9	11	89
10	12	88
11	13	87
12	14	86
13	14	86
14	15	85
15	16	84
16	16	84
17	16	84
18	17	83
19	18	82
20	19	81
21	20	80
22	22	78
23	23	77
24	25	75
25	27	73
26	29	71
27	30	70
28	33	67
29	34	66
30	36	64

	Rain chance (%)
1	92
2	92
3	91
4	91
5	91
6	90
7	90
8	89
9	89
10	88
11	88
12	87
13	87
14	86
15	86
16	85
17	84
18	83
19	82
20	81
21	80
22	78
23	77
24	75
25	74
26	73
27	72
28	70
29	69
30	68

	Oppressive (%)	Miserable (%)
1	0	100
2	0	100
3	0	100
4	0	100
5	0	100
6	0	100
7	0	100
8	0	100
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	2	98
28	2	98
29	2	98
30	2	98

	Avg high (°C)	Avg low (°C)
1	32	27
2	32	27
3	32	27
4	32	27
5	32	27
6	32	27
7	32	27
8	32	27
9	32	27
10	32	27
11	32	27
12	32	27
13	32	27
14	32	27
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	5	95
2	6	94
3	6	94
4	7	93
5	8	92
6	9	91
7	9	91
8	10	90
9	11	89
10	12	88
11	13	87
12	14	86
13	14	86
14	15	85
15	16	84
16	16	84
17	16	84
18	17	83
19	18	82
20	19	81
21	20	80
22	22	78
23	23	77
24	25	75
25	27	73
26	29	71
27	30	70
28	33	67
29	34	66
30	36	64

	Rain chance (%)
1	92
2	92
3	91
4	91
5	91
6	90
7	90
8	89
9	89
10	88
11	88
12	87
13	87
14	86
15	86
16	85
17	84
18	83
19	82
20	81
21	80
22	78
23	77
24	75
25	74
26	73
27	72
28	70
29	69
30	68

	Oppressive (%)	Miserable (%)
1	0	100
2	0	100
3	0	100
4	0	100
5	0	100
6	0	100
7	0	100
8	0	100
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	1	99
21	1	99
22	1	99
23	1	99
24	1	99
25	1	99
26	1	99
27	2	98
28	2	98
29	2	98
30	2	98