Port Blair weather by month
Port Blair runs from about 26°C in October to 30°C in April, with May the wettest month at 370 mm.
warmest month
April
30°C
coolest month
October
26°C
wettest month
May
370 mm
worst air month
March
17 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 54 mm | 342 h | 13 |
| February | 27°C | 3 mm | 336 h | 15 |
| March | 28°C | 6 mm | 364 h | 17 |
| April | 30°C | 10 mm | 359 h | 11 |
| May | 29°C | 370 mm | 280 h | 5 |
| June | 28°C | 329 mm | 209 h | 6 |
| July | 27°C | 286 mm | 221 h | 9 |
| August | 27°C | 319 mm | 263 h | 6 |
| September | 27°C | 192 mm | 268 h | 5 |
| October | 26°C | 297 mm | 279 h | 4 |
| November | 27°C | 175 mm | 293 h | 12 |
| December | 27°C | 180 mm | 296 h | 8 |
About 3,510 hours of sun a year. Roughly 211 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.