| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 33.1° | 20.1° | 1.7mm | 0.4 | 75 |
| February | 35.1° | 22.1° | 10.9mm | 1.3 | 65 |
| March | 37.1° | 23.9° | 42.3mm | 3.6 | 52 |
| April | 37.9° | 25.1° | 60.4mm | 4.3 | 48 |
| May | 36.1° | 25° | 134.6mm | 14 | 36 |
| June | 34.8° | 24.5° | 114.8mm | 11.9 | 45 |
| July | 34.1° | 24.5° | 140.4mm | 17.1 | 42 |
| August | 34° | 24.1° | 98.3mm | 16 | 42 |
| September | 33.6° | 23.9° | 269.8mm | 20.9 | 44 |
| October | 32.6° | 23.2° | 214.9mm | 13.2 | 51 |
| November | 32.1° | 22.1° | 64.5mm | 5.5 | 69 |
| December | 31.8° | 20° | 3.8mm | 1.4 | 78 |
January in Kanchanaburi averages a daily high of 33.1°C with nights around 20.1°C. Rain is rare — about 0.4 wet days and 1.7mm across the month. Comfortable conditions for being outdoors all day.
February in Kanchanaburi averages a daily high of 35.1°C with nights around 22.1°C. Rain is rare — about 1.3 wet days and 10.9mm across the month. Generally workable, with some weather to plan around.
March in Kanchanaburi averages a daily high of 37.1°C with nights around 23.9°C. Expect roughly 3.6 wet days totalling 42.3mm. Demanding conditions — pack for it and plan indoor options.
April in Kanchanaburi averages a daily high of 37.9°C with nights around 25.1°C. Expect roughly 4.3 wet days totalling 60.4mm. Demanding conditions — pack for it and plan indoor options.
May in Kanchanaburi averages a daily high of 36.1°C with nights around 25°C. Expect roughly 14 wet days totalling 134.6mm. Demanding conditions — pack for it and plan indoor options.
June in Kanchanaburi averages a daily high of 34.8°C with nights around 24.5°C. Expect roughly 11.9 wet days totalling 114.8mm. Demanding conditions — pack for it and plan indoor options.
July in Kanchanaburi averages a daily high of 34.1°C with nights around 24.5°C. Expect roughly 17.1 wet days totalling 140.4mm. Demanding conditions — pack for it and plan indoor options.
August in Kanchanaburi averages a daily high of 34°C with nights around 24.1°C. Expect roughly 16 wet days totalling 98.3mm. Demanding conditions — pack for it and plan indoor options.
September in Kanchanaburi averages a daily high of 33.6°C with nights around 23.9°C. Expect roughly 20.9 wet days totalling 269.8mm. Demanding conditions — pack for it and plan indoor options.
October in Kanchanaburi averages a daily high of 32.6°C with nights around 23.2°C. Expect roughly 13.2 wet days totalling 214.9mm. Demanding conditions — pack for it and plan indoor options.
November in Kanchanaburi averages a daily high of 32.1°C with nights around 22.1°C. Expect roughly 5.5 wet days totalling 64.5mm. Generally workable, with some weather to plan around.
December in Kanchanaburi averages a daily high of 31.8°C with nights around 20°C. Rain is rare — about 1.4 wet days and 3.8mm 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. Kanchanaburi peaks at 78.
Based on 30 years of records, December–January scores highest for comfort in Kanchanaburi, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 37.9°C.
September is the wettest, averaging 269.8mm of rain across roughly 20.9 wet days.
December is the coolest month, with average daily highs around 31.8°C.