| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.4° | — | 45.6mm | 7.3 | 48 |
| February | 9.5° | — | 65.9mm | 8.1 | 50 |
| March | 13.8° | — | 117mm | 10.6 | 59 |
| April | 19.4° | — | 113.6mm | 11.1 | 76 |
| May | 24.2° | — | 128.8mm | 10.1 | 80 |
| June | 27.2° | — | 198mm | 12.3 | 75 |
| July | 31.3° | — | 189.6mm | 13.1 | 57 |
| August | 32.8° | — | 151.2mm | 10.8 | 55 |
| September | 28.3° | — | 220.1mm | 11.8 | 71 |
| October | 22.5° | — | 159.9mm | 9.6 | 81 |
| November | 16.8° | — | 70mm | 8.3 | 73 |
| December | 11° | — | 48.7mm | 7.5 | 56 |
January in Iga averages a daily high of 8.4°C. Expect roughly 7.3 wet days totalling 45.6mm. Demanding conditions — pack for it and plan indoor options.
February in Iga averages a daily high of 9.5°C. Expect roughly 8.1 wet days totalling 65.9mm. Demanding conditions — pack for it and plan indoor options.
March in Iga averages a daily high of 13.8°C. Expect roughly 10.6 wet days totalling 117mm. Generally workable, with some weather to plan around.
April in Iga averages a daily high of 19.4°C. Expect roughly 11.1 wet days totalling 113.6mm. Comfortable conditions for being outdoors all day.
May in Iga averages a daily high of 24.2°C. Expect roughly 10.1 wet days totalling 128.8mm. Comfortable conditions for being outdoors all day.
June in Iga averages a daily high of 27.2°C. Expect roughly 12.3 wet days totalling 198mm. Comfortable conditions for being outdoors all day.
July in Iga averages a daily high of 31.3°C. Expect roughly 13.1 wet days totalling 189.6mm. Generally workable, with some weather to plan around.
August in Iga averages a daily high of 32.8°C. Expect roughly 10.8 wet days totalling 151.2mm. Generally workable, with some weather to plan around.
September in Iga averages a daily high of 28.3°C. Expect roughly 11.8 wet days totalling 220.1mm. Generally workable, with some weather to plan around.
October in Iga averages a daily high of 22.5°C. Expect roughly 9.6 wet days totalling 159.9mm. Comfortable conditions for being outdoors all day.
November in Iga averages a daily high of 16.8°C. Expect roughly 8.3 wet days totalling 70mm. Generally workable, with some weather to plan around.
December in Iga averages a daily high of 11°C. Expect roughly 7.5 wet days totalling 48.7mm. Generally workable, with some weather to plan around.
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. Iga peaks at 81.
Based on 30 years of records, April–June scores highest for comfort in Iga, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 32.8°C.
September is the wettest, averaging 220.1mm of rain across roughly 11.8 wet days.
January is the coolest month, with average daily highs around 8.4°C.