| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -0.2° | -4.9° | 31.5mm | 12.1 | 10 |
| February | 1.8° | -3.5° | 38.7mm | 14.1 | 9 |
| March | 6° | -1.5° | 33.7mm | 13.4 | 23 |
| April | 14.5° | 4.2° | 38.4mm | 10.6 | 61 |
| May | 20.1° | 9° | 65.9mm | 11.8 | 76 |
| June | 23.7° | 12.7° | 62.2mm | 11.9 | 76 |
| July | 25.6° | 14.5° | 92.1mm | 13.3 | 73 |
| August | 24.9° | 13.3° | 73.9mm | 9.8 | 80 |
| September | 19° | 8.6° | 47.4mm | 9.4 | 78 |
| October | 12.9° | 5° | 36mm | 10.6 | 56 |
| November | 5.1° | 0.5° | 38.3mm | 13.4 | 23 |
| December | -0.2° | -4.9° | 33.2mm | 12.6 | 9 |
January in Brest averages a daily high of -0.2°C with nights around -4.9°C. Expect roughly 12.1 wet days totalling 31.5mm. A hard month to visit for comfort alone.
February in Brest averages a daily high of 1.8°C with nights around -3.5°C. Expect roughly 14.1 wet days totalling 38.7mm. A hard month to visit for comfort alone.
March in Brest averages a daily high of 6°C with nights around -1.5°C. Expect roughly 13.4 wet days totalling 33.7mm. A hard month to visit for comfort alone.
April in Brest averages a daily high of 14.5°C with nights around 4.2°C. Expect roughly 10.6 wet days totalling 38.4mm. Generally workable, with some weather to plan around.
May in Brest averages a daily high of 20.1°C with nights around 9°C. Expect roughly 11.8 wet days totalling 65.9mm. Comfortable conditions for being outdoors all day.
June in Brest averages a daily high of 23.7°C with nights around 12.7°C. Expect roughly 11.9 wet days totalling 62.2mm. Comfortable conditions for being outdoors all day.
July in Brest averages a daily high of 25.6°C with nights around 14.5°C. Expect roughly 13.3 wet days totalling 92.1mm. Generally workable, with some weather to plan around.
August in Brest averages a daily high of 24.9°C with nights around 13.3°C. Expect roughly 9.8 wet days totalling 73.9mm. Comfortable conditions for being outdoors all day.
September in Brest averages a daily high of 19°C with nights around 8.6°C. Expect roughly 9.4 wet days totalling 47.4mm. Comfortable conditions for being outdoors all day.
October in Brest averages a daily high of 12.9°C with nights around 5°C. Expect roughly 10.6 wet days totalling 36mm. Generally workable, with some weather to plan around.
November in Brest averages a daily high of 5.1°C with nights around 0.5°C. Expect roughly 13.4 wet days totalling 38.3mm. A hard month to visit for comfort alone.
December in Brest averages a daily high of -0.2°C with nights around -4.9°C. Expect roughly 12.6 wet days totalling 33.2mm. 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. Brest peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Brest, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 25.6°C.
July is the wettest, averaging 92.1mm of rain across roughly 13.3 wet days.
January is the coolest month, with average daily highs around -0.2°C.