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Lorient climate by month
What the weather is like
Lorient has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 23° and nights 14°. January is the coolest month, with highs of 10° and lows of 5°. The difference between the warmest and the coolest month is about 11°.
About 923 mm of precipitation falls in an average year. January is the wettest month (104 mm, 16 wet days) and September the driest (66 mm, 8 wet days). Cloud cover ranges from 31% in August to 48% in January.
The sea reaches about 18° 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, Lorient is 3.4° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 23° · August
- Coldest nights
- 5° · February
- Wettest month
- January
- Driest month
- September
- Clearest skies
- August · 31% cloud
- Warmest sea
- 18° · August
- Longest day
- 15 h 59 min
- Shortest day
- 8 h 26 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° | 13° | 15° | 18° | 21° | 22° | 23° | 21° | 17° | 13° | 11° |
| Average low | 5° | 5° | 6° | 7° | 10° | 13° | 14° | 14° | 12° | 11° | 8° | 6° |
| Precipitation | 104 mm | 79 mm | 73 mm | 65 mm | 72 mm | 46 mm | 51 mm | 46 mm | 66 mm | 107 mm | 100 mm | 114 mm |
| Wet days (≥1 mm) | 16 | 12.8 | 12.8 | 10.4 | 11.6 | 9.3 | 10.9 | 10.5 | 8.2 | 14.2 | 15.4 | 15.1 |
| Cloud cover | 48% | 45% | 44% | 38% | 37% | 34% | 32% | 31% | 34% | 42% | 45% | 47% |
| Sea temperature | 11° | 10° | 10° | 12° | 14° | 16° | 18° | 18° | 17° | 16° | 14° | 12° |
| Daylight | 8h 50 | 10h 15 | 11h 51 | 13h 37 | 15h 08 | 15h 59 | 15h 38 | 14h 19 | 12h 37 | 10h 55 | 9h 19 | 8h 26 |
| Month score | 18 | 25 | 35 | 56 | 69 | 76 | 73 | 75 | 79 | 57 | 36 | 22 |