| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 2.4° | — | 23.7mm | 6 | 33 |
| February | 3.6° | — | 43.3mm | 6.7 | 34 |
| March | 8.4° | — | 69.4mm | 8.9 | 45 |
| April | 14.5° | — | 90.1mm | 10.3 | 62 |
| May | 19.7° | — | 113.4mm | 11.1 | 77 |
| June | 21.9° | — | 166.1mm | 14.8 | 70 |
| July | 25.6° | — | 200.8mm | 16.6 | 70 |
| August | 26.6° | — | 148.5mm | 13.1 | 74 |
| September | 21.9° | — | 181.9mm | 13.5 | 73 |
| October | 16.4° | — | 159.9mm | 10 | 68 |
| November | 11.5° | — | 57.1mm | 7 | 59 |
| December | 5.5° | — | 35.7mm | 6.1 | 41 |
January in Ueda averages a daily high of 2.4°C. Expect roughly 6 wet days totalling 23.7mm. A hard month to visit for comfort alone.
February in Ueda averages a daily high of 3.6°C. Expect roughly 6.7 wet days totalling 43.3mm. A hard month to visit for comfort alone.
March in Ueda averages a daily high of 8.4°C. Expect roughly 8.9 wet days totalling 69.4mm. Demanding conditions — pack for it and plan indoor options.
April in Ueda averages a daily high of 14.5°C. Expect roughly 10.3 wet days totalling 90.1mm. Generally workable, with some weather to plan around.
May in Ueda averages a daily high of 19.7°C. Expect roughly 11.1 wet days totalling 113.4mm. Comfortable conditions for being outdoors all day.
June in Ueda averages a daily high of 21.9°C. Expect roughly 14.8 wet days totalling 166.1mm. Generally workable, with some weather to plan around.
July in Ueda averages a daily high of 25.6°C. Expect roughly 16.6 wet days totalling 200.8mm. Generally workable, with some weather to plan around.
August in Ueda averages a daily high of 26.6°C. Expect roughly 13.1 wet days totalling 148.5mm. Generally workable, with some weather to plan around.
September in Ueda averages a daily high of 21.9°C. Expect roughly 13.5 wet days totalling 181.9mm. Generally workable, with some weather to plan around.
October in Ueda averages a daily high of 16.4°C. Expect roughly 10 wet days totalling 159.9mm. Generally workable, with some weather to plan around.
November in Ueda averages a daily high of 11.5°C. Expect roughly 7 wet days totalling 57.1mm. Generally workable, with some weather to plan around.
December in Ueda averages a daily high of 5.5°C. Expect roughly 6.1 wet days totalling 35.7mm. 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. Ueda peaks at 77.
Based on 30 years of records, May–September scores highest for comfort in Ueda, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 26.6°C.
July is the wettest, averaging 200.8mm of rain across roughly 16.6 wet days.
January is the coolest month, with average daily highs around 2.4°C.