| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 9.7° | — | 34.1mm | 6.3 | 54 |
| February | 10.3° | — | 55.4mm | 7.4 | 54 |
| March | 14° | — | 83.8mm | 9.1 | 63 |
| April | 19.2° | — | 86mm | 9.3 | 79 |
| May | 23.9° | — | 104.1mm | 9.2 | 82 |
| June | 26.9° | — | 182.5mm | 11.5 | 77 |
| July | 31° | — | 156.9mm | 10.3 | 63 |
| August | 32.8° | — | 100.6mm | 7.9 | 61 |
| September | 28.9° | — | 181.1mm | 9.9 | 73 |
| October | 23.4° | — | 105.4mm | 8.4 | 83 |
| November | 17.5° | — | 58.6mm | 7.3 | 77 |
| December | 12° | — | 48.8mm | 7.6 | 59 |
January in Kan’onjichō averages a daily high of 9.7°C. Expect roughly 6.3 wet days totalling 34.1mm. Demanding conditions — pack for it and plan indoor options.
February in Kan’onjichō averages a daily high of 10.3°C. Expect roughly 7.4 wet days totalling 55.4mm. Demanding conditions — pack for it and plan indoor options.
March in Kan’onjichō averages a daily high of 14°C. Expect roughly 9.1 wet days totalling 83.8mm. Generally workable, with some weather to plan around.
April in Kan’onjichō averages a daily high of 19.2°C. Expect roughly 9.3 wet days totalling 86mm. Comfortable conditions for being outdoors all day.
May in Kan’onjichō averages a daily high of 23.9°C. Expect roughly 9.2 wet days totalling 104.1mm. Comfortable conditions for being outdoors all day.
June in Kan’onjichō averages a daily high of 26.9°C. Expect roughly 11.5 wet days totalling 182.5mm. Comfortable conditions for being outdoors all day.
July in Kan’onjichō averages a daily high of 31°C. Expect roughly 10.3 wet days totalling 156.9mm. Generally workable, with some weather to plan around.
August in Kan’onjichō averages a daily high of 32.8°C. Expect roughly 7.9 wet days totalling 100.6mm. Generally workable, with some weather to plan around.
September in Kan’onjichō averages a daily high of 28.9°C. Expect roughly 9.9 wet days totalling 181.1mm. Generally workable, with some weather to plan around.
October in Kan’onjichō averages a daily high of 23.4°C. Expect roughly 8.4 wet days totalling 105.4mm. Comfortable conditions for being outdoors all day.
November in Kan’onjichō averages a daily high of 17.5°C. Expect roughly 7.3 wet days totalling 58.6mm. Comfortable conditions for being outdoors all day.
December in Kan’onjichō averages a daily high of 12°C. Expect roughly 7.6 wet days totalling 48.8mm. Generally workable, with some weather to plan around.
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. Kan’onjichō peaks at 83.
Based on 30 years of records, April–June scores highest for comfort in Kan’onjichō, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 32.8°C.
June is the wettest, averaging 182.5mm of rain across roughly 11.5 wet days.
January is the coolest month, with average daily highs around 9.7°C.