| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 9.9° | 5.8° | 71.4mm | 15.3 | 38 |
| February | 10.3° | 6.1° | 49.3mm | 12.8 | 43 |
| March | 12.6° | 7.7° | 51.6mm | 12.3 | 52 |
| April | 14.9° | 9.8° | 46.9mm | 11.3 | 61 |
| May | 17.8° | 12.8° | 45.8mm | 11.4 | 70 |
| June | 20.8° | 15.7° | 40mm | 9.3 | 81 |
| July | 22.4° | 17.5° | 36.5mm | 8.8 | 82 |
| August | 22.6° | 17.7° | 39.1mm | 8.6 | 83 |
| September | 21.1° | 15.7° | 50.7mm | 8.9 | 82 |
| October | 18.1° | 13.3° | 69.7mm | 13.5 | 67 |
| November | 13.7° | 9.4° | 89.9mm | 15.7 | 50 |
| December | 10.8° | 6.5° | 80.5mm | 16.2 | 41 |
January in La Rochelle averages a daily high of 9.9°C with nights around 5.8°C. Expect roughly 15.3 wet days totalling 71.4mm. Demanding conditions — pack for it and plan indoor options.
February in La Rochelle averages a daily high of 10.3°C with nights around 6.1°C. Expect roughly 12.8 wet days totalling 49.3mm. Demanding conditions — pack for it and plan indoor options.
March in La Rochelle averages a daily high of 12.6°C with nights around 7.7°C. Expect roughly 12.3 wet days totalling 51.6mm. Demanding conditions — pack for it and plan indoor options.
April in La Rochelle averages a daily high of 14.9°C with nights around 9.8°C. Expect roughly 11.3 wet days totalling 46.9mm. Generally workable, with some weather to plan around.
May in La Rochelle averages a daily high of 17.8°C with nights around 12.8°C. Expect roughly 11.4 wet days totalling 45.8mm. Generally workable, with some weather to plan around.
June in La Rochelle averages a daily high of 20.8°C with nights around 15.7°C. Expect roughly 9.3 wet days totalling 40mm. Comfortable conditions for being outdoors all day.
July in La Rochelle averages a daily high of 22.4°C with nights around 17.5°C. Expect roughly 8.8 wet days totalling 36.5mm. Comfortable conditions for being outdoors all day.
August in La Rochelle averages a daily high of 22.6°C with nights around 17.7°C. Expect roughly 8.6 wet days totalling 39.1mm. Comfortable conditions for being outdoors all day.
September in La Rochelle averages a daily high of 21.1°C with nights around 15.7°C. Expect roughly 8.9 wet days totalling 50.7mm. Comfortable conditions for being outdoors all day.
October in La Rochelle averages a daily high of 18.1°C with nights around 13.3°C. Expect roughly 13.5 wet days totalling 69.7mm. Generally workable, with some weather to plan around.
November in La Rochelle averages a daily high of 13.7°C with nights around 9.4°C. Expect roughly 15.7 wet days totalling 89.9mm. Demanding conditions — pack for it and plan indoor options.
December in La Rochelle averages a daily high of 10.8°C with nights around 6.5°C. Expect roughly 16.2 wet days totalling 80.5mm. 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. La Rochelle peaks at 83.
Based on 30 years of records, June–September scores highest for comfort in La Rochelle, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 22.6°C.
November is the wettest, averaging 89.9mm of rain across roughly 15.7 wet days.
January is the coolest month, with average daily highs around 9.9°C.