| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 33.3° | 21.6° | 4.1mm | 0.9 | 73 |
| February | 34.9° | 23.1° | 14.7mm | 1.6 | 65 |
| March | 36.5° | 24.7° | 40.7mm | 4.3 | 53 |
| April | 37.1° | 25.9° | 84mm | 7.9 | 44 |
| May | 35.8° | 25.6° | 204.1mm | 16.1 | 35 |
| June | 34.7° | 25.2° | 224.8mm | 19.5 | 39 |
| July | 33.7° | 25° | 286.8mm | 22.2 | 43 |
| August | 33.5° | 24.9° | 368.5mm | 23.9 | 44 |
| September | 33.2° | 24.8° | 411.7mm | 23.7 | 45 |
| October | 33.3° | 24.8° | 170.6mm | 14.4 | 46 |
| November | 33.3° | 23.8° | 22.6mm | 3.4 | 68 |
| December | 32.6° | 21.7° | 0.8mm | 1 | 76 |
January in Si Maha Phot averages a daily high of 33.3°C with nights around 21.6°C. Rain is rare — about 0.9 wet days and 4.1mm across the month. Generally workable, with some weather to plan around.
February in Si Maha Phot averages a daily high of 34.9°C with nights around 23.1°C. Rain is rare — about 1.6 wet days and 14.7mm across the month. Generally workable, with some weather to plan around.
March in Si Maha Phot averages a daily high of 36.5°C with nights around 24.7°C. Expect roughly 4.3 wet days totalling 40.7mm. Demanding conditions — pack for it and plan indoor options.
April in Si Maha Phot averages a daily high of 37.1°C with nights around 25.9°C. Expect roughly 7.9 wet days totalling 84mm. Demanding conditions — pack for it and plan indoor options.
May in Si Maha Phot averages a daily high of 35.8°C with nights around 25.6°C. Expect roughly 16.1 wet days totalling 204.1mm. Demanding conditions — pack for it and plan indoor options.
June in Si Maha Phot averages a daily high of 34.7°C with nights around 25.2°C. Expect roughly 19.5 wet days totalling 224.8mm. Demanding conditions — pack for it and plan indoor options.
July in Si Maha Phot averages a daily high of 33.7°C with nights around 25°C. Expect roughly 22.2 wet days totalling 286.8mm. Demanding conditions — pack for it and plan indoor options.
August in Si Maha Phot averages a daily high of 33.5°C with nights around 24.9°C. Expect roughly 23.9 wet days totalling 368.5mm. Demanding conditions — pack for it and plan indoor options.
September in Si Maha Phot averages a daily high of 33.2°C with nights around 24.8°C. Expect roughly 23.7 wet days totalling 411.7mm. Demanding conditions — pack for it and plan indoor options.
October in Si Maha Phot averages a daily high of 33.3°C with nights around 24.8°C. Expect roughly 14.4 wet days totalling 170.6mm. Demanding conditions — pack for it and plan indoor options.
November in Si Maha Phot averages a daily high of 33.3°C with nights around 23.8°C. Expect roughly 3.4 wet days totalling 22.6mm. Generally workable, with some weather to plan around.
December in Si Maha Phot averages a daily high of 32.6°C with nights around 21.7°C. Rain is rare — about 1 wet days and 0.8mm 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. Si Maha Phot peaks at 76.
Based on 30 years of records, November–January scores highest for comfort in Si Maha Phot, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 37.1°C.
September is the wettest, averaging 411.7mm of rain across roughly 23.7 wet days.
December is the coolest month, with average daily highs around 32.6°C.