| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 30.2° | 23.2° | 42.1mm | 2.3 | 83 |
| February | 31° | 23° | 6.5mm | 1 | 82 |
| March | 32° | 23.7° | 36.4mm | 2.5 | 75 |
| April | 32.8° | 24.7° | 86.9mm | 6.3 | 64 |
| May | 31.4° | 23.7° | 447.1mm | 22.5 | 52 |
| June | 30° | 24.1° | 473.2mm | 23.7 | 58 |
| July | 29.7° | 24.4° | 360.2mm | 23.8 | 59 |
| August | 29.8° | 24° | 388.2mm | 24.8 | 59 |
| September | 29.6° | 23.5° | 535mm | 24.3 | 60 |
| October | 30.4° | 23.9° | 337.2mm | 21.7 | 56 |
| November | 30.7° | 24° | 162.8mm | 15.6 | 55 |
| December | 30.3° | 24° | 63.6mm | 7 | 73 |
January in Port Blair averages a daily high of 30.2°C with nights around 23.2°C. Rain is rare — about 2.3 wet days and 42.1mm across the month. Comfortable conditions for being outdoors all day.
February in Port Blair averages a daily high of 31°C with nights around 23°C. Rain is rare — about 1 wet days and 6.5mm across the month. Comfortable conditions for being outdoors all day.
March in Port Blair averages a daily high of 32°C with nights around 23.7°C. Rain is rare — about 2.5 wet days and 36.4mm across the month. Comfortable conditions for being outdoors all day.
April in Port Blair averages a daily high of 32.8°C with nights around 24.7°C. Expect roughly 6.3 wet days totalling 86.9mm. Generally workable, with some weather to plan around.
May in Port Blair averages a daily high of 31.4°C with nights around 23.7°C. Expect roughly 22.5 wet days totalling 447.1mm. Demanding conditions — pack for it and plan indoor options.
June in Port Blair averages a daily high of 30°C with nights around 24.1°C. Expect roughly 23.7 wet days totalling 473.2mm. Generally workable, with some weather to plan around.
July in Port Blair averages a daily high of 29.7°C with nights around 24.4°C. Expect roughly 23.8 wet days totalling 360.2mm. Generally workable, with some weather to plan around.
August in Port Blair averages a daily high of 29.8°C with nights around 24°C. Expect roughly 24.8 wet days totalling 388.2mm. Generally workable, with some weather to plan around.
September in Port Blair averages a daily high of 29.6°C with nights around 23.5°C. Expect roughly 24.3 wet days totalling 535mm. Generally workable, with some weather to plan around.
October in Port Blair averages a daily high of 30.4°C with nights around 23.9°C. Expect roughly 21.7 wet days totalling 337.2mm. Generally workable, with some weather to plan around.
November in Port Blair averages a daily high of 30.7°C with nights around 24°C. Expect roughly 15.6 wet days totalling 162.8mm. Generally workable, with some weather to plan around.
December in Port Blair averages a daily high of 30.3°C with nights around 24°C. Expect roughly 7 wet days totalling 63.6mm. Generally workable, with some weather to plan around.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Port Blair peaks at 83.
Based on 30 years of records, January–March scores highest for comfort in Port Blair, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 32.8°C.
September is the wettest, averaging 535mm of rain across roughly 24.3 wet days.
September is the coolest month, with average daily highs around 29.6°C.