| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 21.7° | 14.4° | 53.3mm | 8.2 | 84 |
| February | 21.5° | 14.3° | 69.9mm | 8 | 84 |
| March | 20° | 13.1° | 68.2mm | 9.2 | 82 |
| April | 17.6° | — | 74.5mm | 11.3 | 70 |
| May | 15.6° | — | 90.7mm | 13.6 | 59 |
| June | 13.6° | — | 92.5mm | 14.9 | 50 |
| July | 12.8° | — | 115.8mm | 16 | 47 |
| August | 13.3° | — | 104.8mm | 15.1 | 49 |
| September | 14.6° | — | 79.6mm | 12.9 | 57 |
| October | 15.9° | 9.8° | 88.3mm | 12.8 | 61 |
| November | 18.1° | 12° | 58.5mm | 10 | 74 |
| December | 20.1° | 13.6° | 70mm | 10.9 | 78 |
January in Wellington averages a daily high of 21.7°C with nights around 14.4°C. Expect roughly 8.2 wet days totalling 53.3mm. Comfortable conditions for being outdoors all day.
February in Wellington averages a daily high of 21.5°C with nights around 14.3°C. Expect roughly 8 wet days totalling 69.9mm. Comfortable conditions for being outdoors all day.
March in Wellington averages a daily high of 20°C with nights around 13.1°C. Expect roughly 9.2 wet days totalling 68.2mm. Comfortable conditions for being outdoors all day.
April in Wellington averages a daily high of 17.6°C. Expect roughly 11.3 wet days totalling 74.5mm. Generally workable, with some weather to plan around.
May in Wellington averages a daily high of 15.6°C. Expect roughly 13.6 wet days totalling 90.7mm. Generally workable, with some weather to plan around.
June in Wellington averages a daily high of 13.6°C. Expect roughly 14.9 wet days totalling 92.5mm. Demanding conditions — pack for it and plan indoor options.
July in Wellington averages a daily high of 12.8°C. Expect roughly 16 wet days totalling 115.8mm. Demanding conditions — pack for it and plan indoor options.
August in Wellington averages a daily high of 13.3°C. Expect roughly 15.1 wet days totalling 104.8mm. Demanding conditions — pack for it and plan indoor options.
September in Wellington averages a daily high of 14.6°C. Expect roughly 12.9 wet days totalling 79.6mm. Generally workable, with some weather to plan around.
October in Wellington averages a daily high of 15.9°C with nights around 9.8°C. Expect roughly 12.8 wet days totalling 88.3mm. Generally workable, with some weather to plan around.
November in Wellington averages a daily high of 18.1°C with nights around 12°C. Expect roughly 10 wet days totalling 58.5mm. Generally workable, with some weather to plan around.
December in Wellington averages a daily high of 20.1°C with nights around 13.6°C. Expect roughly 10.9 wet days totalling 70mm. Comfortable conditions for being outdoors all day.
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. Wellington peaks at 84.
Based on 30 years of records, December–March scores highest for comfort in Wellington, balancing daytime temperature against rainfall.
January is the warmest, averaging a daily high of 21.7°C.
July is the wettest, averaging 115.8mm of rain across roughly 16 wet days.
July is the coolest month, with average daily highs around 12.8°C.