Kolkata weather in September
September in Kolkata: sweltering, soaked, with very humid — one of the weakest months to visit.
#11 of 12 months in Kolkata · #587 of 604 destinations to visit in September · comfort 43/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Kolkata climate normals — September
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 296 mm / 11.7 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 26°C / 78°F | |
| Sunshine | 7.6 h/day | |
| Daylight | 12.3 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 74 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Kolkata in September — FAQ
- Is September a good time to visit Kolkata?
- September in Kolkata: sweltering, soaked, with very humid — one of the weakest months to visit. It ranks #11 of 12 months for Kolkata on SeasonMap's comfort score (43/100).
- What is the weather like in Kolkata in September?
- In September, Kolkata averages a daily high of 31.1°C and a low of 25.8°C, with about 296 mm of rain over roughly 27.4 rainy days.
- What is the air quality in Kolkata in September?
- Kolkata has a mean US Air Quality Index of about 74 in September.