Kolkata Weather in September
India · Tropical Savanna climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Kolkata sees average temperatures ranging from a low of 25.8°C (78.4°F) to a high of 31.2°C (88.2°F), with a mean of 28.0°C (82.4°F). Compared to the annual average of 26.1°C (79.0°F), this month is 1.9°C warmer than the yearly norm. Precipitation averages 367.9mm, making it approximately 207.0mm wetter than the monthly average of 161.0mm. The city receives an average of 7.7 hours of sunshine per day during September, with relative humidity averaging 87.8%. Wind speeds reach an average maximum of 15.6 km/h. For travelers, this month offers a temperature experience in Kolkata, with wetter-than-average conditions compared to the rest of the year.
Kolkata's tropical savanna climate produces one of the most dramatic monsoon experiences I've studied. The city receives over 1,600mm of annual rainfall, most of it between June and September. I visited during the Durga Puja festival in October, when the city emerges from the monsoon with renewed energy and comfortable temperatures. The winter months of November to February are the clear winners for comfortable sightseeing.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 28.2°C (82.8°F) | 28.0°C (82.4°F) | 27.1°C (80.8°F) |
| Rainfall | 428.7mm | 367.9mm | 197.0mm |
| Sunshine | 7.3 hrs | 7.7 hrs | 9.0 hrs |
| Humidity | 87.0% | 87.8% | 83.9% |
| Wind | 16.4 km/h | 15.6 km/h | 12.3 km/h |
| Rainy Days | 30.8 | 29.0 | 20.6 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Kolkata in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Kolkata in September?
The average temperature in Kolkata during September ranges from 25.8°C (78.4°F) to 31.2°C (88.2°F), with a mean of 28.0°C (82.4°F).
How much does it rain in Kolkata in September?
Kolkata receives an average of 367.9mm of precipitation in September, spread across approximately 29.0 rainy days.
What should I pack for Kolkata in September?
Based on September weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 367.9mm of precipitation.
Is September a good time to visit Kolkata?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Kolkata
Cities with Similar September Climate (Tropical Savanna)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 22.57°, 88.36°. Timezone: Asia/Kolkata. Last updated: 2026-07-30.