Kolkata weather in September
In September, Kolkata has an average high of 30 °C86 °F and an average low of 25 °C77 °F, with about 259 mm10 in of precipitation. It is the 6th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 0.5 °C1 °F cooler on average and drier by 50 mm2.0 in. Compared with October, September is 1.7 °C3 °F warmer on average and wetter by 113 mm4.4 in. Daylight lasts about 12.2 hours around the middle of the month. Average relative humidity is 89% and the average cloud amount 75%.
Is September a good time to visit Kolkata?
September is not among the most comfortable months by our comfort score: it is hot (average high 30 °C86 °F), it is fairly wet (259 mm10 in) and it is humid (89%). The most comfortable months in Kolkata are November–February.
What to wear in September
For Kolkata in September, pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
September in nearby places
Other months in Kolkata
- January24 °C76 °F / 10 °C50 °F
- February30 °C85 °F / 14 °C58 °F
- March35 °C95 °F / 20 °C68 °F
- April38 °C101 °F / 24 °C76 °F
- May37 °C98 °F / 26 °C79 °F
- June33 °C92 °F / 27 °C80 °F
- July31 °C88 °F / 26 °C79 °F
- August31 °C87 °F / 26 °C78 °F
- September30 °C86 °F / 25 °C77 °F
- October30 °C85 °F / 22 °C72 °F
- November27 °C81 °F / 17 °C62 °F
- December24 °C75 °F / 11 °C53 °F
Frequently asked questions
How warm is Kolkata in September?
In September the average high in Kolkata is 30 °C (86 °F) and the average low is 25 °C (77 °F).
Does it rain a lot in Kolkata in September?
On average about 259 mm (10.2 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Kolkata?
No. The warmest month in Kolkata is April, with an average high of 38 °C (101 °F). The coldest month is January, with an average low of 10 °C (50 °F).
How long is the day in Kolkata in September?
In the middle of September the day in Kolkata lasts about 12.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Kolkata in September?
The average relative humidity in September is about 89%. Combined with warm days, it can feel muggy.
How cloudy is Kolkata in September?
On average about 75% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.