| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.7° | 22.9° | 7.5mm | 1.2 | 75 |
| February | 33.3° | 24.6° | 19.8mm | 1.8 | 71 |
| March | 34.1° | 25.8° | 64.3mm | 5.7 | 60 |
| April | 35.2° | 28.2° | 45.8mm | 7 | 53 |
| May | 34.3° | — | 146.4mm | 14.3 | 42 |
| June | 34.2° | 27.1° | 157.2mm | 15.1 | 41 |
| July | 33.4° | — | 169.7mm | 17.5 | 44 |
| August | 33.5° | — | 208.1mm | 18.1 | 44 |
| September | 33° | — | 298.4mm | 22.1 | 46 |
| October | 33.2° | 24.6° | 177.1mm | 16.3 | 45 |
| November | 33.3° | 23.8° | 27mm | 3.9 | 67 |
| December | 32.6° | 22.7° | 5.4mm | 1.5 | 75 |
January in Si Racha averages a daily high of 32.7°C with nights around 22.9°C. Rain is rare — about 1.2 wet days and 7.5mm across the month. Comfortable conditions for being outdoors all day.
February in Si Racha averages a daily high of 33.3°C with nights around 24.6°C. Rain is rare — about 1.8 wet days and 19.8mm across the month. Generally workable, with some weather to plan around.
March in Si Racha averages a daily high of 34.1°C with nights around 25.8°C. Expect roughly 5.7 wet days totalling 64.3mm. Generally workable, with some weather to plan around.
April in Si Racha averages a daily high of 35.2°C with nights around 28.2°C. Expect roughly 7 wet days totalling 45.8mm. Demanding conditions — pack for it and plan indoor options.
May in Si Racha averages a daily high of 34.3°C. Expect roughly 14.3 wet days totalling 146.4mm. Demanding conditions — pack for it and plan indoor options.
June in Si Racha averages a daily high of 34.2°C with nights around 27.1°C. Expect roughly 15.1 wet days totalling 157.2mm. Demanding conditions — pack for it and plan indoor options.
July in Si Racha averages a daily high of 33.4°C. Expect roughly 17.5 wet days totalling 169.7mm. Demanding conditions — pack for it and plan indoor options.
August in Si Racha averages a daily high of 33.5°C. Expect roughly 18.1 wet days totalling 208.1mm. Demanding conditions — pack for it and plan indoor options.
September in Si Racha averages a daily high of 33°C. Expect roughly 22.1 wet days totalling 298.4mm. Demanding conditions — pack for it and plan indoor options.
October in Si Racha averages a daily high of 33.2°C with nights around 24.6°C. Expect roughly 16.3 wet days totalling 177.1mm. Demanding conditions — pack for it and plan indoor options.
November in Si Racha averages a daily high of 33.3°C with nights around 23.8°C. Expect roughly 3.9 wet days totalling 27mm. Generally workable, with some weather to plan around.
December in Si Racha averages a daily high of 32.6°C with nights around 22.7°C. Rain is rare — about 1.5 wet days and 5.4mm 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. Si Racha peaks at 75.
Based on 30 years of records, November–February scores highest for comfort in Si Racha, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 35.2°C.
September is the wettest, averaging 298.4mm of rain across roughly 22.1 wet days.
December is the coolest month, with average daily highs around 32.6°C.