| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 1.8° | — | 146.3mm | 24.7 | 15 |
| February | 2.9° | — | 105.6mm | 20.3 | 15 |
| March | 6.9° | — | 74mm | 15.7 | 28 |
| April | 13.9° | — | 77.1mm | 12.9 | 55 |
| May | 19.2° | — | 75.8mm | 11.3 | 75 |
| June | 22.3° | — | 73.2mm | 9.5 | 81 |
| July | 26.3° | — | 136.3mm | 11 | 78 |
| August | 27.8° | — | 141.7mm | 10.1 | 77 |
| September | 24.6° | — | 119.7mm | 10.7 | 79 |
| October | 18.4° | — | 127.5mm | 13.5 | 68 |
| November | 11.6° | — | 146.3mm | 18.1 | 43 |
| December | 4.8° | — | 188.3mm | 23.9 | 21 |
January in Hirosaki averages a daily high of 1.8°C. Expect roughly 24.7 wet days totalling 146.3mm. A hard month to visit for comfort alone.
February in Hirosaki averages a daily high of 2.9°C. Expect roughly 20.3 wet days totalling 105.6mm. A hard month to visit for comfort alone.
March in Hirosaki averages a daily high of 6.9°C. Expect roughly 15.7 wet days totalling 74mm. A hard month to visit for comfort alone.
April in Hirosaki averages a daily high of 13.9°C. Expect roughly 12.9 wet days totalling 77.1mm. Generally workable, with some weather to plan around.
May in Hirosaki averages a daily high of 19.2°C. Expect roughly 11.3 wet days totalling 75.8mm. Comfortable conditions for being outdoors all day.
June in Hirosaki averages a daily high of 22.3°C. Expect roughly 9.5 wet days totalling 73.2mm. Comfortable conditions for being outdoors all day.
July in Hirosaki averages a daily high of 26.3°C. Expect roughly 11 wet days totalling 136.3mm. Comfortable conditions for being outdoors all day.
August in Hirosaki averages a daily high of 27.8°C. Expect roughly 10.1 wet days totalling 141.7mm. Comfortable conditions for being outdoors all day.
September in Hirosaki averages a daily high of 24.6°C. Expect roughly 10.7 wet days totalling 119.7mm. Comfortable conditions for being outdoors all day.
October in Hirosaki averages a daily high of 18.4°C. Expect roughly 13.5 wet days totalling 127.5mm. Generally workable, with some weather to plan around.
November in Hirosaki averages a daily high of 11.6°C. Expect roughly 18.1 wet days totalling 146.3mm. Demanding conditions — pack for it and plan indoor options.
December in Hirosaki averages a daily high of 4.8°C. Expect roughly 23.9 wet days totalling 188.3mm. A hard month to visit for comfort alone.
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. Hirosaki peaks at 81.
Based on 30 years of records, May–September scores highest for comfort in Hirosaki, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 27.8°C.
December is the wettest, averaging 188.3mm of rain across roughly 23.9 wet days.
January is the coolest month, with average daily highs around 1.8°C.