| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -3.6° | — | 69.5mm | 22 | 15 |
| February | -1.9° | — | 61mm | 19.9 | 15 |
| March | 2.9° | — | 54.4mm | 17.7 | 15 |
| April | 11.2° | — | 46.7mm | 13.2 | 45 |
| May | 19.1° | — | 67.1mm | 12.7 | 72 |
| June | 22.7° | — | 83.8mm | 11.2 | 78 |
| July | 26.3° | — | 128.9mm | 10.9 | 78 |
| August | 26.3° | — | 165.6mm | 13.1 | 74 |
| September | 22.1° | — | 115.6mm | 12 | 76 |
| October | 14.7° | — | 115.8mm | 16.6 | 53 |
| November | 6.1° | — | 116.1mm | 20.8 | 26 |
| December | -0.8° | — | 107.7mm | 24.7 | 15 |
January in Asahikawa averages a daily high of -3.6°C. Expect roughly 22 wet days totalling 69.5mm. A hard month to visit for comfort alone.
February in Asahikawa averages a daily high of -1.9°C. Expect roughly 19.9 wet days totalling 61mm. A hard month to visit for comfort alone.
March in Asahikawa averages a daily high of 2.9°C. Expect roughly 17.7 wet days totalling 54.4mm. A hard month to visit for comfort alone.
April in Asahikawa averages a daily high of 11.2°C. Expect roughly 13.2 wet days totalling 46.7mm. Demanding conditions — pack for it and plan indoor options.
May in Asahikawa averages a daily high of 19.1°C. Expect roughly 12.7 wet days totalling 67.1mm. Generally workable, with some weather to plan around.
June in Asahikawa averages a daily high of 22.7°C. Expect roughly 11.2 wet days totalling 83.8mm. Comfortable conditions for being outdoors all day.
July in Asahikawa averages a daily high of 26.3°C. Expect roughly 10.9 wet days totalling 128.9mm. Comfortable conditions for being outdoors all day.
August in Asahikawa averages a daily high of 26.3°C. Expect roughly 13.1 wet days totalling 165.6mm. Generally workable, with some weather to plan around.
September in Asahikawa averages a daily high of 22.1°C. Expect roughly 12 wet days totalling 115.6mm. Comfortable conditions for being outdoors all day.
October in Asahikawa averages a daily high of 14.7°C. Expect roughly 16.6 wet days totalling 115.8mm. Demanding conditions — pack for it and plan indoor options.
November in Asahikawa averages a daily high of 6.1°C. Expect roughly 20.8 wet days totalling 116.1mm. A hard month to visit for comfort alone.
December in Asahikawa averages a daily high of -0.8°C. Expect roughly 24.7 wet days totalling 107.7mm. 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. Asahikawa peaks at 78.
Based on 30 years of records, May–September scores highest for comfort in Asahikawa, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.3°C.
August is the wettest, averaging 165.6mm of rain across roughly 13.1 wet days.
January is the coolest month, with average daily highs around -3.6°C.