Mumbai Weather in September
India · Tropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Mumbai sees average temperatures ranging from a low of 25.0°C (77.0°F) to a high of 28.4°C (83.1°F), with a mean of 26.5°C (79.7°F). Compared to the annual average of 26.8°C (80.2°F), this month is 0.3°C cooler than the yearly norm. Precipitation averages 454.6mm, making it approximately 250.0mm wetter than the monthly average of 205.0mm. The city receives an average of 8.0 hours of sunshine per day during September, with relative humidity averaging 87.9%. Wind speeds reach an average maximum of 17.4 km/h. For travelers, this month offers a temperature experience in Mumbai, with wetter-than-average conditions compared to the rest of the year.
There's something about Mumbai during monsoon that feels like the city is briefly honest with itself. I arrived in July expecting chaos and found poetry — kids playing in flooded streets, chai stalls steaming in the rain, the Arabian Sea churning against Marine Drive. The data says June-September brings 2,200mm of rain; what it can't capture is the joy. November-February is when the city reawakens dry and pleasant at 28°C — the cultural calendar fills up. March-May is harsh: 35°C with 75% humidity. Diwali (October-November) is when Mumbai shines brightest.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 26.6°C (79.9°F) | 26.5°C (79.7°F) | 27.2°C (81.0°F) |
| Rainfall | 475.5mm | 454.6mm | 90.1mm |
| Sunshine | 7.2 hrs | 8.0 hrs | 10.0 hrs |
| Humidity | 86.9% | 87.9% | 80.3% |
| Wind | 21.6 km/h | 17.4 km/h | 15.1 km/h |
| Rainy Days | 31.0 | 30.0 | 17.4 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Mumbai 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 Mumbai in September?
The average temperature in Mumbai during September ranges from 25.0°C (77.0°F) to 28.4°C (83.1°F), with a mean of 26.5°C (79.7°F).
How much does it rain in Mumbai in September?
Mumbai receives an average of 454.6mm of precipitation in September, spread across approximately 30.0 rainy days.
What should I pack for Mumbai in September?
Based on September weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 454.6mm of precipitation.
Is September a good time to visit Mumbai?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Mumbai
Cities with Similar September Climate (Tropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 19.08°, 72.88°. Timezone: Asia/Kolkata. Last updated: 2026-07-30.