Port Blair weather in September
September in Port Blair: warm, soaked, with clean air — a gamble, with 27 rainy days.
#12 of 12 months in Port Blair · #836 of 897 destinations to visit in September · comfort 55/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Port Blair in September
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Port Blair climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Rainfall | 405 mm / 15.9 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 7.1 h/day | |
| Daylight | 12.2 h | |
| Wind | 30 km/h / 19 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Port Blair in September — FAQ
- Is September a good time to visit Port Blair?
- September in Port Blair: warm, soaked, with clean air — a gamble, with 27 rainy days. It ranks #12 of 12 months for Port Blair on SeasonMap's comfort score (55/100).
- What is the weather like in Port Blair in September?
- In September, Port Blair averages a daily high of 27.8°C and a low of 26°C, with about 404.5 mm of rain over roughly 27 rainy days.
- What is the air quality in Port Blair in September?
- Port Blair has a mean US Air Quality Index of about 35 in September.