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Lorient, Brittany climate
Cfb Oceanic / temperate
Lorient has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 23°C, while the coldest is January averaging around 3°C at night. Around 869 mm of precipitation falls each year, peaking in December (103 mm) and easing off in June (47 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Lorient climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 13 | 15 | 18 | 21 | 23 | 23 | 21 | 17 | 13 | 11 |
| Avg temp (°C) | 7 | 7 | 9 | 11 | 14 | 16 | 18 | 18 | 16 | 13 | 10 | 7 |
| Avg low (°C) | 3 | 3 | 5 | 6 | 9 | 11 | 13 | 13 | 11 | 9 | 6 | 4 |
| Precipitation (mm) | 101 | 79 | 64 | 58 | 66 | 47 | 52 | 50 | 53 | 95 | 99 | 103 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 13 | 15 | 18 | 21 |
| Avg temp (°C) | 7 | 7 | 9 | 11 | 14 | 16 |
| Avg low (°C) | 3 | 3 | 5 | 6 | 9 | 11 |
| Precipitation (mm) | 101 | 79 | 64 | 58 | 66 | 47 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 23 | 21 | 17 | 13 | 11 |
| Avg temp (°C) | 18 | 18 | 16 | 13 | 10 | 7 |
| Avg low (°C) | 13 | 13 | 11 | 9 | 6 | 4 |
| Precipitation (mm) | 52 | 50 | 53 | 95 | 99 | 103 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 70 | 67 | 62 | 63 | 59 | 57 | 57 | 55 | 67 | 71 | 73 |
| Relative humidity (%) | 92 | 90 | 88 | 84 | 82 | 80 | 76 | 75 | 78 | 85 | 90 | 92 |
| Wind speed (mph) | 8.7 | 8.5 | 8.2 | 7.8 | 7.4 | 7.0 | 6.9 | 6.7 | 7.0 | 7.7 | 8.0 | 8.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 70 | 67 | 62 | 63 | 59 |
| Relative humidity (%) | 92 | 90 | 88 | 84 | 82 | 80 |
| Wind speed (mph) | 8.7 | 8.5 | 8.2 | 7.8 | 7.4 | 7.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 57 | 55 | 67 | 71 | 73 |
| Relative humidity (%) | 76 | 75 | 78 | 85 | 90 | 92 |
| Wind speed (mph) | 6.9 | 6.7 | 7.0 | 7.7 | 8.0 | 8.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Lorient Lann Bihoue, a weather station, about 5 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.