| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 30.8° | 17.7° | 0.7mm | 0.1 | 85 |
| February | 33° | 19.7° | 35.4mm | 3.9 | 68 |
| March | 35.2° | 21° | 57.6mm | 4.9 | 57 |
| April | 36° | 24.3° | 102.9mm | 6.9 | 50 |
| May | 34.5° | 24.1° | 137.9mm | 13 | 44 |
| June | 34.1° | 24.9° | 150.6mm | 14.4 | 43 |
| July | 33° | 24.4° | 216.5mm | 18 | 46 |
| August | 32.5° | 23.9° | 232.4mm | 20.5 | 48 |
| September | 32° | 23.6° | 286.1mm | 21 | 50 |
| October | 32° | 22.8° | 131.7mm | 10.1 | 60 |
| November | 31.6° | 20.2° | 26.8mm | 3.3 | 75 |
| December | 30.1° | 19.5° | 2.9mm | 0.5 | 87 |
January in Khon Kaen averages a daily high of 30.8°C with nights around 17.7°C. Rain is rare — about 0.1 wet days and 0.7mm across the month. Comfortable conditions for being outdoors all day.
February in Khon Kaen averages a daily high of 33°C with nights around 19.7°C. Expect roughly 3.9 wet days totalling 35.4mm. Generally workable, with some weather to plan around.
March in Khon Kaen averages a daily high of 35.2°C with nights around 21°C. Expect roughly 4.9 wet days totalling 57.6mm. Generally workable, with some weather to plan around.
April in Khon Kaen averages a daily high of 36°C with nights around 24.3°C. Expect roughly 6.9 wet days totalling 102.9mm. Demanding conditions — pack for it and plan indoor options.
May in Khon Kaen averages a daily high of 34.5°C with nights around 24.1°C. Expect roughly 13 wet days totalling 137.9mm. Demanding conditions — pack for it and plan indoor options.
June in Khon Kaen averages a daily high of 34.1°C with nights around 24.9°C. Expect roughly 14.4 wet days totalling 150.6mm. Demanding conditions — pack for it and plan indoor options.
July in Khon Kaen averages a daily high of 33°C with nights around 24.4°C. Expect roughly 18 wet days totalling 216.5mm. Demanding conditions — pack for it and plan indoor options.
August in Khon Kaen averages a daily high of 32.5°C with nights around 23.9°C. Expect roughly 20.5 wet days totalling 232.4mm. Demanding conditions — pack for it and plan indoor options.
September in Khon Kaen averages a daily high of 32°C with nights around 23.6°C. Expect roughly 21 wet days totalling 286.1mm. Demanding conditions — pack for it and plan indoor options.
October in Khon Kaen averages a daily high of 32°C with nights around 22.8°C. Expect roughly 10.1 wet days totalling 131.7mm. Generally workable, with some weather to plan around.
November in Khon Kaen averages a daily high of 31.6°C with nights around 20.2°C. Expect roughly 3.3 wet days totalling 26.8mm. Comfortable conditions for being outdoors all day.
December in Khon Kaen averages a daily high of 30.1°C with nights around 19.5°C. Rain is rare — about 0.5 wet days and 2.9mm 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. Khon Kaen peaks at 87.
Based on 30 years of records, December–January scores highest for comfort in Khon Kaen, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 36°C.
September is the wettest, averaging 286.1mm of rain across roughly 21 wet days.
December is the coolest month, with average daily highs around 30.1°C.