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Kolkata in September: Weather, Average temperature and Climate

Discover the weather for Kolkata in September and if it’s a good time to travel (based on historical data).
Check flight prices to Kolkata on Avionero:
September

Weather in Kolkata in September 2025

OK Weather
Hot
🌧️
Rainy
September could be a good time to visit Kolkata, as the weather is generally fine. The average high temperature is around +32°C, and there are typically 1 sunny days in September. However, expect about 22 rainy days, and total monthly rainfall of approximately 175 mm. The weather is changeable so pack for every eventuality. Search flights in one click on Avionero.
Good to know:
  • September is usually the wettest month of the year in Kolkata;

Average weather

☀️
+32°C
Avg. max. temperature
+23°C
Min.
+36°C
Max.
175 mm
Total precipitation
86%
Avg. humidity
1 m/s
Avg. wind
1 ☀️
Sunny Days
2 ⛅️
Cloudy
22 🌦
Rainy
Our opinion: Kolkata has OK weather in September.

Average temperature in Kolkata in September

Here are the expected maximum, average and minimum temperatures in Kolkata for September based on the historical data.
Last Year
Historical Data

The expected average maximum temperature in September is +32°C with a maximum of +35°C and a minimum of +26°C.

The average maximum temperature goes down 56% by the end of the month, compared with the beginning of the month, from +34°C to +29°C.

Is Kolkata warm or cold in September?

Kolkata is typically hot in September.

Maximum temperatures go up compared to the previous month from +32°C to +32°C. The minimum temperature also goes down from +27°C to +26°C.

Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.

Take a look at how September is compared to other months in Kolkata:

Climate in Kolkata in September

Kolkata weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+32°C+32°C+31°C
Min. temperature
+25°C+23°C+18°C
Max. temperature
+36°C+36°C+36°C
Rainfall
213 mm175 mm85 mm
Wind
2 m/s1 m/s1 m/s
Humidity
86%86%82%
Air pressure
1000 HPa1004 HPa1009 HPa
Sunny days
0110
Cloudy days
225
Rainy days
252213
Snowy days
000

September weather is still as ok as in August. The temperature levels stay the same in the area of +32°C for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 213 mm to 175 mm. Humidity levels don’t change as the month goes on, averaging around 86%. Winds are calmer in comparison to August, going down from 2 m/s to 1 m/s on average. The good news is there are likely to be more sunny days in September, from 0 to 1.

But maybe it is worth considering traveling in October as the weather gets better.

Wind

Wind speed in Kolkata in September based on historical data.
Last Year
Historical Data

The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Kolkata is gradually increasing during September, going from 2 m/s to 4 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Kolkata based on historical data.
Last Year
Historical Data
Total precipitation in September is about 129 mm, with a 77% chance of rain on a typical day. The maximum amount of rainfall per day is around 18 mm, which is considered light rain. September is a pretty wet month with over 23 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Kolkata wettest month is July, where a typical day has a 84% chance of precipitation and 248 mm of rainfall per day. January, on the other hand, is the driest month with a mere 10% chance of precipitation and 8 mm of rainfall per day.

How was the weather last September in Kolkata?

This is the weather in Kolkata in September 2023:
1 September
🌫️
+34°C
2 September
🌫️
+34°C
3 September
🌫️
+33°C
4 September
🌫️
+32°C
5 September
🌫️
+31°C
6 September
🌫️
+33°C
7 September
🌫️
+31°C
8 September
🌫️
+30°C
9 September
🌫️
+34°C
10 September
🌫️
+34°C
11 September
🌫️
+34°C
12 September
🌫️
+33°C
13 September
🌫️
+33°C
14 September
🌫️
+30°C
15 September
🌫️
+31°C
16 September
🌫️
+34°C
17 September
🌫️
+35°C
18 September
🌫️
+33°C
19 September
🌫️
+31°C
20 September
🌫️
+30°C
21 September
🌫️
+29°C
22 September
🌧️
+30°C
23 September
🌫️
+31°C
24 September
🌫️
+30°C
25 September
🌫️
+32°C
26 September
🌫️
+34°C
27 September
🌫️
+34°C
28 September
🌫️
+34°C
29 September
🌧️
+31°C
30 September
🌫️
+29°C
In September 2023 Kolkata had 0 sunny days, 0 cloudy days, and 2 rainy days. The average maximum temperature was +32°C, with an absolute maximum of +35°C and a minimum of +29°C. The average humidity was 88%, with a maximum of 100% and a minimum of 66%. The average wind speed was 2 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change over Years

This is how Kolkata climate have been changing during last 43 years period.

The climate in Kolkata in September has not changed much over the last 43 years.

The average temperature was the lowest in 1981 (+30°C) and the highest in 2009 (+32°C). The driest year was 2012 with only 487 mm of rainfall, and the wettest year was 1990 with 1926 mm.

FAQ

Frequently asked questions about the weather in Kolkata in September:

Is September a good time to visit Kolkata?

It’s always a good time to visit Kolkata, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Kolkata in September?

Absolutely, September is hot in Kolkata. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.

Is Kolkata rainy in September?

Kolkata is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Kolkata in September?

Usually, it’s not very sunny in Kolkata in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in India

Check out the weather for other cities in India.

Monthly weather in Kolkata

Source of the data

For this page, we’ve looked at the typical weather in Kolkata, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.