| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.1° | — | 26.7mm | 5.7 | 41 |
| February | 6.9° | — | 41.1mm | 6.4 | 45 |
| March | 11.7° | — | 81.2mm | 8.8 | 56 |
| April | 18.2° | — | 89.7mm | 9.4 | 75 |
| May | 24° | — | 103.2mm | 8.8 | 82 |
| June | 26.6° | — | 118.7mm | 12.1 | 76 |
| July | 30.3° | — | 140.5mm | 14.2 | 58 |
| August | 31.5° | — | 114.1mm | 10 | 62 |
| September | 26.2° | — | 152.2mm | 10.9 | 78 |
| October | 20° | — | 147mm | 8.7 | 83 |
| November | 14.1° | — | 58.4mm | 7.1 | 67 |
| December | 8.2° | — | 38.7mm | 6.1 | 50 |
January in Matsumoto averages a daily high of 5.1°C. Expect roughly 5.7 wet days totalling 26.7mm. Demanding conditions — pack for it and plan indoor options.
February in Matsumoto averages a daily high of 6.9°C. Expect roughly 6.4 wet days totalling 41.1mm. Demanding conditions — pack for it and plan indoor options.
March in Matsumoto averages a daily high of 11.7°C. Expect roughly 8.8 wet days totalling 81.2mm. Generally workable, with some weather to plan around.
April in Matsumoto averages a daily high of 18.2°C. Expect roughly 9.4 wet days totalling 89.7mm. Comfortable conditions for being outdoors all day.
May in Matsumoto averages a daily high of 24°C. Expect roughly 8.8 wet days totalling 103.2mm. Comfortable conditions for being outdoors all day.
June in Matsumoto averages a daily high of 26.6°C. Expect roughly 12.1 wet days totalling 118.7mm. Comfortable conditions for being outdoors all day.
July in Matsumoto averages a daily high of 30.3°C. Expect roughly 14.2 wet days totalling 140.5mm. Generally workable, with some weather to plan around.
August in Matsumoto averages a daily high of 31.5°C. Expect roughly 10 wet days totalling 114.1mm. Generally workable, with some weather to plan around.
September in Matsumoto averages a daily high of 26.2°C. Expect roughly 10.9 wet days totalling 152.2mm. Comfortable conditions for being outdoors all day.
October in Matsumoto averages a daily high of 20°C. Expect roughly 8.7 wet days totalling 147mm. Comfortable conditions for being outdoors all day.
November in Matsumoto averages a daily high of 14.1°C. Expect roughly 7.1 wet days totalling 58.4mm. Generally workable, with some weather to plan around.
December in Matsumoto averages a daily high of 8.2°C. Expect roughly 6.1 wet days totalling 38.7mm. Demanding conditions — pack for it and plan indoor options.
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. Matsumoto peaks at 83.
Based on 30 years of records, April–June scores highest for comfort in Matsumoto, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 31.5°C.
September is the wettest, averaging 152.2mm of rain across roughly 10.9 wet days.
January is the coolest month, with average daily highs around 5.1°C.