| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 2.5° | -7.7° | 100.2mm | 10.8 | 9 |
| February | 4.3° | -7.5° | 89.1mm | 9.2 | 17 |
| March | 8.6° | -3.4° | 101.8mm | 9.9 | 36 |
| April | 15.5° | 2.3° | 115.1mm | 11.4 | 63 |
| May | 21.4° | 8.2° | 110.9mm | 12.6 | 75 |
| June | 25.9° | 13.3° | 117.9mm | 11.4 | 77 |
| July | 28.9° | 16.3° | 131.2mm | 11.7 | 69 |
| August | 27.8° | 15.5° | 128.9mm | 10.3 | 76 |
| September | 24.2° | 11.5° | 134.4mm | 9 | 82 |
| October | 17.6° | 5.3° | 149mm | 10.6 | 71 |
| November | 11.3° | -0.3° | 91.5mm | 8.8 | 51 |
| December | 5.4° | -4.7° | 129.5mm | 11.4 | 20 |
January in Bristol averages a daily high of 2.5°C with nights around -7.7°C. Expect roughly 10.8 wet days totalling 100.2mm. A hard month to visit for comfort alone.
February in Bristol averages a daily high of 4.3°C with nights around -7.5°C. Expect roughly 9.2 wet days totalling 89.1mm. A hard month to visit for comfort alone.
March in Bristol averages a daily high of 8.6°C with nights around -3.4°C. Expect roughly 9.9 wet days totalling 101.8mm. Demanding conditions — pack for it and plan indoor options.
April in Bristol averages a daily high of 15.5°C with nights around 2.3°C. Expect roughly 11.4 wet days totalling 115.1mm. Generally workable, with some weather to plan around.
May in Bristol averages a daily high of 21.4°C with nights around 8.2°C. Expect roughly 12.6 wet days totalling 110.9mm. Comfortable conditions for being outdoors all day.
June in Bristol averages a daily high of 25.9°C with nights around 13.3°C. Expect roughly 11.4 wet days totalling 117.9mm. Comfortable conditions for being outdoors all day.
July in Bristol averages a daily high of 28.9°C with nights around 16.3°C. Expect roughly 11.7 wet days totalling 131.2mm. Generally workable, with some weather to plan around.
August in Bristol averages a daily high of 27.8°C with nights around 15.5°C. Expect roughly 10.3 wet days totalling 128.9mm. Comfortable conditions for being outdoors all day.
September in Bristol averages a daily high of 24.2°C with nights around 11.5°C. Expect roughly 9 wet days totalling 134.4mm. Comfortable conditions for being outdoors all day.
October in Bristol averages a daily high of 17.6°C with nights around 5.3°C. Expect roughly 10.6 wet days totalling 149mm. Generally workable, with some weather to plan around.
November in Bristol averages a daily high of 11.3°C with nights around -0.3°C. Expect roughly 8.8 wet days totalling 91.5mm. Demanding conditions — pack for it and plan indoor options.
December in Bristol averages a daily high of 5.4°C with nights around -4.7°C. Expect roughly 11.4 wet days totalling 129.5mm. 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. Bristol peaks at 82.
Based on 30 years of records, May–June scores highest for comfort in Bristol, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.9°C.
October is the wettest, averaging 149mm of rain across roughly 10.6 wet days.
January is the coolest month, with average daily highs around 2.5°C.