| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 30.8° | — | 26.4mm | 2.8 | 79 |
| February | 31.5° | — | 18.2mm | 3 | 76 |
| March | 32.3° | 25.1° | 89.3mm | 7 | 65 |
| April | 32.7° | 25.4° | 143.1mm | 11.2 | 55 |
| May | 31.8° | — | 258.2mm | 16.8 | 51 |
| June | 31° | — | 317.7mm | 18.6 | 54 |
| July | 30.3° | — | 479.9mm | 21.3 | 57 |
| August | 29.9° | — | 423.7mm | 21.3 | 58 |
| September | 29.9° | — | 508mm | 22 | 58 |
| October | 30.6° | — | 344.4mm | 19.8 | 56 |
| November | 31.1° | 23.9° | 164.2mm | 12.4 | 59 |
| December | 30.8° | 23.4° | 73.1mm | 5.5 | 74 |
January in Hà Tiên averages a daily high of 30.8°C. Rain is rare — about 2.8 wet days and 26.4mm across the month. Comfortable conditions for being outdoors all day.
February in Hà Tiên averages a daily high of 31.5°C. Expect roughly 3 wet days totalling 18.2mm. Comfortable conditions for being outdoors all day.
March in Hà Tiên averages a daily high of 32.3°C with nights around 25.1°C. Expect roughly 7 wet days totalling 89.3mm. Generally workable, with some weather to plan around.
April in Hà Tiên averages a daily high of 32.7°C with nights around 25.4°C. Expect roughly 11.2 wet days totalling 143.1mm. Generally workable, with some weather to plan around.
May in Hà Tiên averages a daily high of 31.8°C. Expect roughly 16.8 wet days totalling 258.2mm. Demanding conditions — pack for it and plan indoor options.
June in Hà Tiên averages a daily high of 31°C. Expect roughly 18.6 wet days totalling 317.7mm. Demanding conditions — pack for it and plan indoor options.
July in Hà Tiên averages a daily high of 30.3°C. Expect roughly 21.3 wet days totalling 479.9mm. Generally workable, with some weather to plan around.
August in Hà Tiên averages a daily high of 29.9°C. Expect roughly 21.3 wet days totalling 423.7mm. Generally workable, with some weather to plan around.
September in Hà Tiên averages a daily high of 29.9°C. Expect roughly 22 wet days totalling 508mm. Generally workable, with some weather to plan around.
October in Hà Tiên averages a daily high of 30.6°C. Expect roughly 19.8 wet days totalling 344.4mm. Generally workable, with some weather to plan around.
November in Hà Tiên averages a daily high of 31.1°C with nights around 23.9°C. Expect roughly 12.4 wet days totalling 164.2mm. Generally workable, with some weather to plan around.
December in Hà Tiên averages a daily high of 30.8°C with nights around 23.4°C. Expect roughly 5.5 wet days totalling 73.1mm. 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. Hà Tiên peaks at 79.
Based on 30 years of records, December–February scores highest for comfort in Hà Tiên, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 32.7°C.
September is the wettest, averaging 508mm of rain across roughly 22 wet days.
August is the coolest month, with average daily highs around 29.9°C.