Kolkata Weather in September
With daytime temperatures of 33°C (91°F) and nighttime lows of 27°C (81°F), September in Kolkata brings very high temperatures during the day. Do keep in mind that September is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Kolkata in September
As part of the rainy season, Kolkata sees around 12 days of rain in September, with an average of 260 mm (10 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours, often in the late afternoon.
Temperature in Kolkata in September
Temperatures in Kolkata in September top out at 33°C (91°F) and drop to 27°C (81°F) overnight. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Kolkata in September
The month brings about 125 hours of sunlight, offering a comfortable mix of sun and rainy moments.
Wind Speed in Kolkata in September
Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.
Average water temperature in September
The water is 28°C (82°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.September in Kolkata can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit India, check out our Kolkata's climate page.
Kolkata Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
33°C (91°F)
Water Temperature
28°C (82°F) *
Chance of Rain
40%
Precipitation
260 mm (10 in)
Rainy days
12 days
Humidity
81% *
Windspeed
1 m/s (2 knots) *
Sunshine
125 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Kolkata typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Kolkata in September
Browse day-by-day weather records for Kolkata spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kolkata historical weather extremes in September
Based on 22 years of weather observations (2003-2025), these are the most extreme conditions recorded in Kolkata.
- The hottest September day on record in Kolkata reached 37°C (99°F) (September 9, 2015).
- Kolkata experienced its chilliest September day on September 14, 2004, reaching only 25°C (77°F).
- The coldest night in September in Kolkata was on September 26, 2019, with a minimum of 23°C (73°F).
Best Places in India in September
Find out more about the weather in India and which places have the best travel conditions in this month. See all of India in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Kolkata in September
Warm but pleasant conditions in Kolkata in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Kolkata in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit India, check out our Kolkata's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Kolkata climate overview or explore weather in India.
