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La Rochelle climate by month
What the weather is like
La Rochelle has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 25° and nights 16°. January is the coolest month, with highs of 10° and lows of 4°. The difference between the warmest and the coolest month is about 14°.
About 776 mm of precipitation falls in an average year. January is the wettest month (75 mm, 14 wet days) and September the driest (55 mm, 8 wet days). Cloud cover ranges from 27% in July to 46% in January.
The sea reaches about 20° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Paris, the capital, La Rochelle is 0.7° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 25° · August
- Coldest nights
- 4° · February
- Wettest month
- January
- Driest month
- September
- Clearest skies
- July · 27% cloud
- Warmest sea
- 20° · August
- Longest day
- 15 h 45 min
- Shortest day
- 8 h 39 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 10° | 11° | 14° | 16° | 20° | 23° | 25° | 25° | 23° | 18° | 13° | 10° |
| Average low | 4° | 4° | 6° | 8° | 11° | 14° | 16° | 16° | 13° | 11° | 7° | 5° |
| Precipitation | 75 mm | 54 mm | 58 mm | 64 mm | 63 mm | 39 mm | 48 mm | 44 mm | 55 mm | 94 mm | 93 mm | 89 mm |
| Wet days (≥1 mm) | 14.2 | 10.3 | 12.2 | 9.6 | 11.6 | 10.4 | 8.7 | 8.4 | 7.6 | 12.8 | 13.5 | 13.2 |
| Cloud cover | 46% | 43% | 40% | 38% | 37% | 32% | 27% | 27% | 31% | 39% | 44% | 46% |
| Sea temperature | 10° | 10° | 10° | 12° | 15° | 18° | 19° | 20° | 19° | 17° | 14° | 12° |
| Daylight | 9h 01 | 10h 21 | 11h 51 | 13h 32 | 14h 57 | 15h 45 | 15h 26 | 14h 12 | 12h 35 | 10h 59 | 9h 28 | 8h 39 |
| Month score | 18 | 31 | 45 | 65 | 70 | 75 | 79 | 79 | 82 | 66 | 38 | 21 |