Climate averages 1991–2020
Port Blair weather
in September.
A warm, very wet month: the joint 9th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Port Blair: daytime highs average 27.7°C and nights cool to about 25.8°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 323 mm of rain on roughly 27 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 12 min on an average September day.
The nearest other city in this atlas is Pathein (607 km away). In September its highs average 29.2°C, 1.6°C warmer than Port Blair, with 366 mm of rain.
Among the 692 cities listed in India, Port Blair ranks joint 643rd of 692 for the warmest September highs and 675th of 692 for the driest September (rainfall, lowest first). The mean September high of those 692 cities is 30.7°C; Port Blair is 3.0°C cooler than that mean.
From September to October, average highs rise by 0.1°C to 27.7°C, and monthly rainfall falls from 323 mm to 265 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Port Blair climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.3°C25.3°C | 25.3°C | 33 | 4.9 | 11.512 h |
| February | 27.9°C25.3°C | 25.3°C | 10 | 2.0 | 11.812 h |
| March | 28.8°C25.8°C | 25.8°C | 32 | 4.0 | 12.112 h |
| April | 29.8°C26.9°C | 26.9°C | 70 | 8.5 | 12.412 h |
| May | 29.1°C26.8°C | 26.8°C | 271 | 24.5 | 12.713 h |
| June | 28.4°C26.6°C | 26.6°C | 327 | 25.7 | 12.813 h |
| July | 28.1°C26.2°C | 26.2°C | 295 | 27.9 | 12.713 h |
| August | 27.9°C26.1°C | 26.1°C | 296 | 27.5 | 12.513 h |
| September, selected | 27.7°C25.8°C | 25.8°C | 323 | 27.3 | 12.212 h |
| October | 27.7°C25.7°C | 25.7°C | 265 | 24.9 | 11.912 h |
| November | 27.8°C26.0°C | 26.0°C | 180 | 16.4 | 11.612 h |
| December | 27.5°C25.8°C | 25.8°C | 93 | 8.7 | 11.511 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Pathein in SeptemberMyanmar · 607 kmHigh 29.2°C · Low 24.2°C · 366 mm rain
- Dawbon in SeptemberMyanmar · 621 kmHigh 29.6°C · Low 24.2°C · 376 mm rain
- Myeik in SeptemberMyanmar · 642 kmHigh 28.2°C · Low 23.8°C · 596 mm rain
- Dawei in SeptemberMyanmar · 648 kmHigh 27.4°C · Low 23.4°C · 516 mm rain
- Kyauktan in SeptemberMyanmar · 674 kmHigh 28.8°C · Low 24.7°C · 359 mm rain
- Set Ka Lay in SeptemberMyanmar · 678 kmHigh 29.6°C · Low 24.3°C · 388 mm rain
- Hlaingthaya in SeptemberMyanmar · 678 kmHigh 29.6°C · Low 24.3°C · 388 mm rain
- Yangon in SeptemberMyanmar · 679 kmHigh 29.4°C · Low 24.2°C · 359 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Port Blair) is explained once on the Port Blair year overview and on the Sources, method and limits page.