| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7° | — | 246mm | 24.4 | 28 |
| February | 7.7° | — | 170.1mm | 19.4 | 31 |
| March | 11.6° | — | 151.3mm | 16.5 | 43 |
| April | 17.1° | — | 161.1mm | 12.9 | 65 |
| May | 22.6° | — | 142.8mm | 11.1 | 78 |
| June | 25.6° | — | 167mm | 10.8 | 78 |
| July | 29.7° | — | 238.2mm | 14.2 | 61 |
| August | 31.5° | — | 185.4mm | 10.3 | 61 |
| September | 27.2° | — | 230.1mm | 12.5 | 74 |
| October | 21.8° | — | 186.7mm | 11.9 | 76 |
| November | 15.9° | — | 255.3mm | 17.7 | 57 |
| December | 10.4° | — | 325.9mm | 24.6 | 39 |
January in Nonoichi averages a daily high of 7°C. Expect roughly 24.4 wet days totalling 246mm. A hard month to visit for comfort alone.
February in Nonoichi averages a daily high of 7.7°C. Expect roughly 19.4 wet days totalling 170.1mm. A hard month to visit for comfort alone.
March in Nonoichi averages a daily high of 11.6°C. Expect roughly 16.5 wet days totalling 151.3mm. Demanding conditions — pack for it and plan indoor options.
April in Nonoichi averages a daily high of 17.1°C. Expect roughly 12.9 wet days totalling 161.1mm. Generally workable, with some weather to plan around.
May in Nonoichi averages a daily high of 22.6°C. Expect roughly 11.1 wet days totalling 142.8mm. Comfortable conditions for being outdoors all day.
June in Nonoichi averages a daily high of 25.6°C. Expect roughly 10.8 wet days totalling 167mm. Comfortable conditions for being outdoors all day.
July in Nonoichi averages a daily high of 29.7°C. Expect roughly 14.2 wet days totalling 238.2mm. Generally workable, with some weather to plan around.
August in Nonoichi averages a daily high of 31.5°C. Expect roughly 10.3 wet days totalling 185.4mm. Generally workable, with some weather to plan around.
September in Nonoichi averages a daily high of 27.2°C. Expect roughly 12.5 wet days totalling 230.1mm. Generally workable, with some weather to plan around.
October in Nonoichi averages a daily high of 21.8°C. Expect roughly 11.9 wet days totalling 186.7mm. Comfortable conditions for being outdoors all day.
November in Nonoichi averages a daily high of 15.9°C. Expect roughly 17.7 wet days totalling 255.3mm. Generally workable, with some weather to plan around.
December in Nonoichi averages a daily high of 10.4°C. Expect roughly 24.6 wet days totalling 325.9mm. 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. Nonoichi peaks at 78.
Based on 30 years of records, May–June scores highest for comfort in Nonoichi, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 31.5°C.
December is the wettest, averaging 325.9mm of rain across roughly 24.6 wet days.
January is the coolest month, with average daily highs around 7°C.