| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.5° | 22° | 30.8mm | 1.6 | 75 |
| February | 32.9° | 23.6° | 34.7mm | 3.7 | 69 |
| March | 33.4° | 24.6° | 60.6mm | 5.6 | 63 |
| April | 34.3° | 25.2° | 110.8mm | 9.8 | 51 |
| May | 33.3° | 25.1° | 403.1mm | 22.4 | 45 |
| June | 32.3° | 24.9° | 467.7mm | 24.6 | 49 |
| July | 31.6° | 24.7° | 555.6mm | 26.1 | 52 |
| August | 31.7° | 25° | 502.8mm | 24.6 | 51 |
| September | 31.6° | 24.2° | 525.1mm | 25.6 | 52 |
| October | 32.5° | 23.8° | 315.6mm | 19.1 | 48 |
| November | 32.6° | 23.7° | 43.8mm | 6.8 | 64 |
| December | 32° | 22.5° | 9.3mm | 1.9 | 76 |
January in Chanthaburi averages a daily high of 32.5°C with nights around 22°C. Rain is rare — about 1.6 wet days and 30.8mm across the month. Comfortable conditions for being outdoors all day.
February in Chanthaburi averages a daily high of 32.9°C with nights around 23.6°C. Expect roughly 3.7 wet days totalling 34.7mm. Generally workable, with some weather to plan around.
March in Chanthaburi averages a daily high of 33.4°C with nights around 24.6°C. Expect roughly 5.6 wet days totalling 60.6mm. Generally workable, with some weather to plan around.
April in Chanthaburi averages a daily high of 34.3°C with nights around 25.2°C. Expect roughly 9.8 wet days totalling 110.8mm. Demanding conditions — pack for it and plan indoor options.
May in Chanthaburi averages a daily high of 33.3°C with nights around 25.1°C. Expect roughly 22.4 wet days totalling 403.1mm. Demanding conditions — pack for it and plan indoor options.
June in Chanthaburi averages a daily high of 32.3°C with nights around 24.9°C. Expect roughly 24.6 wet days totalling 467.7mm. Demanding conditions — pack for it and plan indoor options.
July in Chanthaburi averages a daily high of 31.6°C with nights around 24.7°C. Expect roughly 26.1 wet days totalling 555.6mm. Demanding conditions — pack for it and plan indoor options.
August in Chanthaburi averages a daily high of 31.7°C with nights around 25°C. Expect roughly 24.6 wet days totalling 502.8mm. Demanding conditions — pack for it and plan indoor options.
September in Chanthaburi averages a daily high of 31.6°C with nights around 24.2°C. Expect roughly 25.6 wet days totalling 525.1mm. Demanding conditions — pack for it and plan indoor options.
October in Chanthaburi averages a daily high of 32.5°C with nights around 23.8°C. Expect roughly 19.1 wet days totalling 315.6mm. Demanding conditions — pack for it and plan indoor options.
November in Chanthaburi averages a daily high of 32.6°C with nights around 23.7°C. Expect roughly 6.8 wet days totalling 43.8mm. Generally workable, with some weather to plan around.
December in Chanthaburi averages a daily high of 32°C with nights around 22.5°C. Rain is rare — about 1.9 wet days and 9.3mm across the month. 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. Chanthaburi peaks at 76.
Based on 30 years of records, December–February scores highest for comfort in Chanthaburi, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 34.3°C.
July is the wettest, averaging 555.6mm of rain across roughly 26.1 wet days.
July is the coolest month, with average daily highs around 31.6°C.