| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 12.9° | — | 75.6mm | 10.6 | 56 |
| February | 14.7° | — | 124.3mm | 10.6 | 62 |
| March | 17.5° | — | 153.5mm | 12.9 | 66 |
| April | 21.9° | — | 179.8mm | 10.6 | 79 |
| May | 25.7° | — | 233mm | 11.6 | 77 |
| June | 27.8° | — | 584mm | 17.9 | 67 |
| July | 32.1° | — | 386.8mm | 14.9 | 50 |
| August | 32.8° | — | 234.3mm | 14.5 | 48 |
| September | 30.4° | — | 244.8mm | 11.8 | 63 |
| October | 26° | — | 117.5mm | 8.7 | 83 |
| November | 20.5° | — | 123.3mm | 9.4 | 81 |
| December | 15.5° | — | 109.6mm | 10.3 | 65 |
January in Kokubu-matsuki averages a daily high of 12.9°C. Expect roughly 10.6 wet days totalling 75.6mm. Generally workable, with some weather to plan around.
February in Kokubu-matsuki averages a daily high of 14.7°C. Expect roughly 10.6 wet days totalling 124.3mm. Generally workable, with some weather to plan around.
March in Kokubu-matsuki averages a daily high of 17.5°C. Expect roughly 12.9 wet days totalling 153.5mm. Generally workable, with some weather to plan around.
April in Kokubu-matsuki averages a daily high of 21.9°C. Expect roughly 10.6 wet days totalling 179.8mm. Comfortable conditions for being outdoors all day.
May in Kokubu-matsuki averages a daily high of 25.7°C. Expect roughly 11.6 wet days totalling 233mm. Comfortable conditions for being outdoors all day.
June in Kokubu-matsuki averages a daily high of 27.8°C. Expect roughly 17.9 wet days totalling 584mm. Generally workable, with some weather to plan around.
July in Kokubu-matsuki averages a daily high of 32.1°C. Expect roughly 14.9 wet days totalling 386.8mm. Demanding conditions — pack for it and plan indoor options.
August in Kokubu-matsuki averages a daily high of 32.8°C. Expect roughly 14.5 wet days totalling 234.3mm. Demanding conditions — pack for it and plan indoor options.
September in Kokubu-matsuki averages a daily high of 30.4°C. Expect roughly 11.8 wet days totalling 244.8mm. Generally workable, with some weather to plan around.
October in Kokubu-matsuki averages a daily high of 26°C. Expect roughly 8.7 wet days totalling 117.5mm. Comfortable conditions for being outdoors all day.
November in Kokubu-matsuki averages a daily high of 20.5°C. Expect roughly 9.4 wet days totalling 123.3mm. Comfortable conditions for being outdoors all day.
December in Kokubu-matsuki averages a daily high of 15.5°C. Expect roughly 10.3 wet days totalling 109.6mm. 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. Kokubu-matsuki peaks at 83.
Based on 30 years of records, April–May scores highest for comfort in Kokubu-matsuki, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 32.8°C.
June is the wettest, averaging 584mm of rain across roughly 17.9 wet days.
January is the coolest month, with average daily highs around 12.9°C.