| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.5° | 3.6° | 82.6mm | 16.1 | 33 |
| February | 9° | 3.8° | 57.9mm | 12.8 | 39 |
| March | 10.8° | 4.8° | 44.9mm | 10.9 | 49 |
| April | 13.6° | 6.6° | 39.3mm | 9.7 | 60 |
| May | 16.5° | 9.7° | 45.8mm | 9.9 | 69 |
| June | 19.2° | 12.5° | 41.5mm | 8.7 | 80 |
| July | 21.2° | 14.7° | 48.1mm | 9.3 | 81 |
| August | 21.5° | 15° | 62.6mm | 10 | 80 |
| September | 19.4° | 12.7° | 55.4mm | 10 | 78 |
| October | 15.9° | 10.1° | 95.1mm | 14.7 | 57 |
| November | 12.2° | 6.8° | 96mm | 15.7 | 45 |
| December | 9.3° | 4.2° | 93.3mm | 14.8 | 36 |
January in Brighton averages a daily high of 8.5°C with nights around 3.6°C. Expect roughly 16.1 wet days totalling 82.6mm. A hard month to visit for comfort alone.
February in Brighton averages a daily high of 9°C with nights around 3.8°C. Expect roughly 12.8 wet days totalling 57.9mm. Demanding conditions — pack for it and plan indoor options.
March in Brighton averages a daily high of 10.8°C with nights around 4.8°C. Expect roughly 10.9 wet days totalling 44.9mm. Demanding conditions — pack for it and plan indoor options.
April in Brighton averages a daily high of 13.6°C with nights around 6.6°C. Expect roughly 9.7 wet days totalling 39.3mm. Generally workable, with some weather to plan around.
May in Brighton averages a daily high of 16.5°C with nights around 9.7°C. Expect roughly 9.9 wet days totalling 45.8mm. Generally workable, with some weather to plan around.
June in Brighton averages a daily high of 19.2°C with nights around 12.5°C. Expect roughly 8.7 wet days totalling 41.5mm. Comfortable conditions for being outdoors all day.
July in Brighton averages a daily high of 21.2°C with nights around 14.7°C. Expect roughly 9.3 wet days totalling 48.1mm. Comfortable conditions for being outdoors all day.
August in Brighton averages a daily high of 21.5°C with nights around 15°C. Expect roughly 10 wet days totalling 62.6mm. Comfortable conditions for being outdoors all day.
September in Brighton averages a daily high of 19.4°C with nights around 12.7°C. Expect roughly 10 wet days totalling 55.4mm. Comfortable conditions for being outdoors all day.
October in Brighton averages a daily high of 15.9°C with nights around 10.1°C. Expect roughly 14.7 wet days totalling 95.1mm. Generally workable, with some weather to plan around.
November in Brighton averages a daily high of 12.2°C with nights around 6.8°C. Expect roughly 15.7 wet days totalling 96mm. Demanding conditions — pack for it and plan indoor options.
December in Brighton averages a daily high of 9.3°C with nights around 4.2°C. Expect roughly 14.8 wet days totalling 93.3mm. 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. Brighton peaks at 81.
Based on 30 years of records, June–September scores highest for comfort in Brighton, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 21.5°C.
November is the wettest, averaging 96mm of rain across roughly 15.7 wet days.
January is the coolest month, with average daily highs around 8.5°C.