Delhi Weather in September
India · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Delhi sees average temperatures ranging from a low of 25.0°C (77.0°F) to a high of 32.7°C (90.9°F), with a mean of 28.4°C (83.1°F). Compared to the annual average of 24.4°C (75.9°F), this month is 4.0°C warmer than the yearly norm. Precipitation averages 160.1mm, making it approximately 92.0mm wetter than the monthly average of 68.0mm. The city receives an average of 9.9 hours of sunshine per day during September, with relative humidity averaging 76.1%. Wind speeds reach an average maximum of 15.1 km/h. For travelers, this month offers a temperature experience in Delhi, with wetter-than-average conditions compared to the rest of the year.
Delhi's data shows climate at its most extreme. May averages 33°C, January averages 14°C — but the felt extremes are wilder. I tracked a week in late June: 39°C with 60% humidity, air quality in the 'unhealthy' range. The monsoon (July-September) brings 200mm/month but also relief from the pre-monsoon heat. October-November is statistically the best window: 22°C, low humidity, UV manageable. December-February brings cold mornings (7°C) and dangerous smog — PM2.5 regularly exceeds 200. The numbers favor February-March and October-November as the only genuinely pleasant windows.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 29.1°C (84.4°F) | 28.4°C (83.1°F) | 25.4°C (77.7°F) |
| Rainfall | 154.1mm | 160.1mm | 28.1mm |
| Sunshine | 9.4 hrs | 9.9 hrs | 10.5 hrs |
| Humidity | 77.6% | 76.1% | 61.5% |
| Wind | 16.3 km/h | 15.1 km/h | 13.3 km/h |
| Rainy Days | 23.6 | 19.4 | 3.0 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Delhi 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 Delhi in September?
The average temperature in Delhi during September ranges from 25.0°C (77.0°F) to 32.7°C (90.9°F), with a mean of 28.4°C (83.1°F).
How much does it rain in Delhi in September?
Delhi receives an average of 160.1mm of precipitation in September, spread across approximately 19.4 rainy days.
What should I pack for Delhi in September?
Based on September weather data, pack lightweight, breathable clothing, sunscreen, and a hat. Rain gear is essential — this month averages 160.1mm of precipitation.
Is September a good time to visit Delhi?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Delhi
Cities with Similar September Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 28.61°, 77.21°. Timezone: Asia/Kolkata. Last updated: 2026-07-30.