| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.6° | 19.4° | 0.3mm | 0.4 | 77 |
| February | 34.9° | 22.3° | 22.3mm | 1.4 | 66 |
| March | 37.1° | 25° | 38.3mm | 3 | 54 |
| April | 38° | 26.4° | 52.2mm | 3.7 | 49 |
| May | 36.2° | 25.8° | 156.1mm | 14.6 | 34 |
| June | 35.1° | 25.5° | 133.9mm | 15.5 | 38 |
| July | 34.1° | 25.1° | 191.2mm | 20.5 | 42 |
| August | 33.9° | 25° | 193.9mm | 19.4 | 42 |
| September | 33.2° | 24.7° | 297.9mm | 22.3 | 45 |
| October | 33° | 24.3° | 132.6mm | 12.7 | 51 |
| November | 32.7° | 22.6° | 32.9mm | 3.8 | 70 |
| December | 31.7° | 19.4° | 7.3mm | 0.9 | 79 |
January in Nakhon Sawan averages a daily high of 32.6°C with nights around 19.4°C. Rain is rare — about 0.4 wet days and 0.3mm across the month. Comfortable conditions for being outdoors all day.
February in Nakhon Sawan averages a daily high of 34.9°C with nights around 22.3°C. Rain is rare — about 1.4 wet days and 22.3mm across the month. Generally workable, with some weather to plan around.
March in Nakhon Sawan averages a daily high of 37.1°C with nights around 25°C. Expect roughly 3 wet days totalling 38.3mm. Demanding conditions — pack for it and plan indoor options.
April in Nakhon Sawan averages a daily high of 38°C with nights around 26.4°C. Expect roughly 3.7 wet days totalling 52.2mm. Demanding conditions — pack for it and plan indoor options.
May in Nakhon Sawan averages a daily high of 36.2°C with nights around 25.8°C. Expect roughly 14.6 wet days totalling 156.1mm. A hard month to visit for comfort alone.
June in Nakhon Sawan averages a daily high of 35.1°C with nights around 25.5°C. Expect roughly 15.5 wet days totalling 133.9mm. Demanding conditions — pack for it and plan indoor options.
July in Nakhon Sawan averages a daily high of 34.1°C with nights around 25.1°C. Expect roughly 20.5 wet days totalling 191.2mm. Demanding conditions — pack for it and plan indoor options.
August in Nakhon Sawan averages a daily high of 33.9°C with nights around 25°C. Expect roughly 19.4 wet days totalling 193.9mm. Demanding conditions — pack for it and plan indoor options.
September in Nakhon Sawan averages a daily high of 33.2°C with nights around 24.7°C. Expect roughly 22.3 wet days totalling 297.9mm. Demanding conditions — pack for it and plan indoor options.
October in Nakhon Sawan averages a daily high of 33°C with nights around 24.3°C. Expect roughly 12.7 wet days totalling 132.6mm. Demanding conditions — pack for it and plan indoor options.
November in Nakhon Sawan averages a daily high of 32.7°C with nights around 22.6°C. Expect roughly 3.8 wet days totalling 32.9mm. Generally workable, with some weather to plan around.
December in Nakhon Sawan averages a daily high of 31.7°C with nights around 19.4°C. Rain is rare — about 0.9 wet days and 7.3mm 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. Nakhon Sawan peaks at 79.
Based on 30 years of records, December–January scores highest for comfort in Nakhon Sawan, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 38°C.
September is the wettest, averaging 297.9mm of rain across roughly 22.3 wet days.
December is the coolest month, with average daily highs around 31.7°C.