La Rochelle, where it's located

The climate of La Rochelle is oceanic, with mild winters and warm summers.
The city is located in western France, on the Atlantic coast, and is the capital of the Charente Maritime department.
The average temperature of the coldest month (January) is of 6.6 °C (44 °F), that of the warmest month (July) is of 20.6 °C (69 °F). Here are the average temperatures.
La Rochelle - Average temperatures
Min (°C)446812151716141174
Max (°C)91013161922242422181310
Min (°F)393943465459636157524539
Max (°F)485055616672757572645550

Precipitation amounts to 765 millimeters (30.1 inches) per year: so, it is at an intermediate level. It ranges from 40 mm (1.6 in) in the driest month (June) to 95 mm (3.7 in) in the wettest (November). Here is the average precipitation.
La Rochelle - Average precipitation

On average, there are around 2,110 sunshine hours per year. Here are the average sunshine hours per day.
La Rochelle - Sunshine

The sea temperature ranges between 11 °C (52 °F) and 21 °C (70 °F): therefore it remains cool even in summer. Here are the average sea temperatures.
La Rochelle - Sea temperature
Temp (°C)121111121518202120181513
Temp (°F)545252545964687068645955

La Rochelle

Best Time

The best time to visit La Rochelle runs from mid-May to September, since it is the warmest and sunniest time of the year. We can not exclude that some nights may be a bit cold, especially in May, June and September, but even in midsummer it's better to bring a sweatshirt for the evening, and maybe an umbrella. Those who want to avoid the albeit rare heat waves, can avoid the period from mid-June to late August.