| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.6° | 2° | 95.4mm | 18.4 | 30 |
| February | 8.6° | 2.3° | 91.4mm | 16.3 | 34 |
| March | 10.5° | 3.1° | 69.9mm | 14.3 | 41 |
| April | 13.3° | 4.8° | 52mm | 12.6 | 53 |
| May | 16.4° | 7.7° | 70.2mm | 13 | 62 |
| June | 19° | 10.6° | 74.8mm | 13.5 | 70 |
| July | 20.4° | 12.5° | 94.6mm | 15.4 | 70 |
| August | 20.4° | 12.6° | 96.9mm | 16.2 | 70 |
| September | 18.1° | 10.5° | 104.9mm | 15 | 64 |
| October | 14.5° | 8° | 119.5mm | 18.5 | 52 |
| November | 10.6° | 4.4° | 104.4mm | 19.4 | 40 |
| December | 8.1° | 1.9° | 121mm | 19.2 | 32 |
January in Birkenhead averages a daily high of 7.6°C with nights around 2°C. Expect roughly 18.4 wet days totalling 95.4mm. A hard month to visit for comfort alone.
February in Birkenhead averages a daily high of 8.6°C with nights around 2.3°C. Expect roughly 16.3 wet days totalling 91.4mm. A hard month to visit for comfort alone.
March in Birkenhead averages a daily high of 10.5°C with nights around 3.1°C. Expect roughly 14.3 wet days totalling 69.9mm. Demanding conditions — pack for it and plan indoor options.
April in Birkenhead averages a daily high of 13.3°C with nights around 4.8°C. Expect roughly 12.6 wet days totalling 52mm. Demanding conditions — pack for it and plan indoor options.
May in Birkenhead averages a daily high of 16.4°C with nights around 7.7°C. Expect roughly 13 wet days totalling 70.2mm. Generally workable, with some weather to plan around.
June in Birkenhead averages a daily high of 19°C with nights around 10.6°C. Expect roughly 13.5 wet days totalling 74.8mm. Generally workable, with some weather to plan around.
July in Birkenhead averages a daily high of 20.4°C with nights around 12.5°C. Expect roughly 15.4 wet days totalling 94.6mm. Generally workable, with some weather to plan around.
August in Birkenhead averages a daily high of 20.4°C with nights around 12.6°C. Expect roughly 16.2 wet days totalling 96.9mm. Generally workable, with some weather to plan around.
September in Birkenhead averages a daily high of 18.1°C with nights around 10.5°C. Expect roughly 15 wet days totalling 104.9mm. Generally workable, with some weather to plan around.
October in Birkenhead averages a daily high of 14.5°C with nights around 8°C. Expect roughly 18.5 wet days totalling 119.5mm. Demanding conditions — pack for it and plan indoor options.
November in Birkenhead averages a daily high of 10.6°C with nights around 4.4°C. Expect roughly 19.4 wet days totalling 104.4mm. Demanding conditions — pack for it and plan indoor options.
December in Birkenhead averages a daily high of 8.1°C with nights around 1.9°C. Expect roughly 19.2 wet days totalling 121mm. A hard month to visit for comfort alone.
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. Birkenhead peaks at 70.
Based on 30 years of records, May–September scores highest for comfort in Birkenhead, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 20.4°C.
December is the wettest, averaging 121mm of rain across roughly 19.2 wet days.
January is the coolest month, with average daily highs around 7.6°C.