| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 29.6° | 22.9° | 11mm | 1.1 | 87 |
| February | 29.9° | 22.4° | 0.3mm | 0.3 | 88 |
| March | 31.2° | 23.8° | 3.5mm | 0.6 | 82 |
| April | 32.5° | 25.3° | 26.8mm | 2.5 | 73 |
| May | 33.1° | 26.4° | 154.2mm | 11.1 | 53 |
| June | 32.6° | — | 126.4mm | 12 | 54 |
| July | 31.8° | — | 169.4mm | 16.1 | 51 |
| August | 31.8° | — | 149mm | 15.7 | 51 |
| September | 31.7° | — | 185.5mm | 16.3 | 51 |
| October | 31.4° | 24.1° | 142.5mm | 12.4 | 58 |
| November | 31.1° | 24.3° | 80.8mm | 6.1 | 71 |
| December | 30.4° | 22.7° | 31.8mm | 3.4 | 80 |
January in Phan Thiết averages a daily high of 29.6°C with nights around 22.9°C. Rain is rare — about 1.1 wet days and 11mm across the month. Comfortable conditions for being outdoors all day.
February in Phan Thiết averages a daily high of 29.9°C with nights around 22.4°C. Rain is rare — about 0.3 wet days and 0.3mm across the month. Comfortable conditions for being outdoors all day.
March in Phan Thiết averages a daily high of 31.2°C with nights around 23.8°C. Rain is rare — about 0.6 wet days and 3.5mm across the month. Comfortable conditions for being outdoors all day.
April in Phan Thiết averages a daily high of 32.5°C with nights around 25.3°C. Rain is rare — about 2.5 wet days and 26.8mm across the month. Generally workable, with some weather to plan around.
May in Phan Thiết averages a daily high of 33.1°C with nights around 26.4°C. Expect roughly 11.1 wet days totalling 154.2mm. Demanding conditions — pack for it and plan indoor options.
June in Phan Thiết averages a daily high of 32.6°C. Expect roughly 12 wet days totalling 126.4mm. Demanding conditions — pack for it and plan indoor options.
July in Phan Thiết averages a daily high of 31.8°C. Expect roughly 16.1 wet days totalling 169.4mm. Demanding conditions — pack for it and plan indoor options.
August in Phan Thiết averages a daily high of 31.8°C. Expect roughly 15.7 wet days totalling 149mm. Demanding conditions — pack for it and plan indoor options.
September in Phan Thiết averages a daily high of 31.7°C. Expect roughly 16.3 wet days totalling 185.5mm. Demanding conditions — pack for it and plan indoor options.
October in Phan Thiết averages a daily high of 31.4°C with nights around 24.1°C. Expect roughly 12.4 wet days totalling 142.5mm. Generally workable, with some weather to plan around.
November in Phan Thiết averages a daily high of 31.1°C with nights around 24.3°C. Expect roughly 6.1 wet days totalling 80.8mm. Generally workable, with some weather to plan around.
December in Phan Thiết averages a daily high of 30.4°C with nights around 22.7°C. Expect roughly 3.4 wet days totalling 31.8mm. Comfortable conditions for being outdoors all day.
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. Phan Thiết peaks at 88.
Based on 30 years of records, December–March scores highest for comfort in Phan Thiết, balancing daytime temperature against rainfall.
May is the warmest, averaging a daily high of 33.1°C.
September is the wettest, averaging 185.5mm of rain across roughly 16.3 wet days.
January is the coolest month, with average daily highs around 29.6°C.