September · India
Best time to visit Kolkata in September Weather, crowds & prices
Weather in Kolkata in September
Average temperature 28°C, 322 mm of rain, about 13 days with 6+ hours of sunshine and 90% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
2.3/10
Ranked #12 of 12 months
- Avg temp
- 28°C
- Rainfall
- 322 mm
- Humidity
- 90%
- Days with 6h+ sun
- 13
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Kolkata scores 2.3/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 28°C, 322 mm of rain, and roughly 13 days with 6+ hours of sunshine this month.
Kolkata's colonial squares, trams and riverfront mix with markets and a fierce cultural life.
September in Kolkata: expect compromises
Days in September average 28°C (83°F) and humidity near 90% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 322 mm: only about 13 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 2.3/10 on the same scale — 12th of 12 months, versus 9.3/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, February is materially better in Kolkata — 7 points higher on the same scale.
Frequently asked
- What is the weather like in Kolkata in September?
- In September, Kolkata averages 28°C, 322 mm of rain, and about 13 days with 6+ hours of sunshine. Its climate-comfort score is 2.3/10.
- Is September a good time to visit Kolkata?
- September earns a 2.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kolkata in September?
- Expect about 322 mm of rain in September. Average humidity is 90% and there are about 13 days with 6+ hours of sunshine.
Curated in Kolkata
Tickets & experiences
Things to do in Kolkata
Kolkata, India. Live activities and tours from GetYourGuide, matched to this destination.