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Arcachon, Nouvelle-Aquitaine climate
Cfb Oceanic / temperate
Arcachon has a seasonal mild-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 28°C, while the coldest is January averaging around 3°C at night. Around 876 mm of precipitation falls each year, peaking in November (102 mm) and easing off in July (45 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)Arcachon climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 12 | 16 | 18 | 22 | 26 | 28 | 28 | 25 | 20 | 14 | 11 |
| Avg temp (°C) | 7 | 8 | 11 | 13 | 16 | 20 | 22 | 22 | 19 | 15 | 10 | 8 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 11 | 14 | 16 | 16 | 13 | 10 | 6 | 4 |
| Precipitation (mm) | 87 | 62 | 61 | 68 | 69 | 72 | 45 | 54 | 78 | 79 | 102 | 102 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 12 | 16 | 18 | 22 | 26 |
| Avg temp (°C) | 7 | 8 | 11 | 13 | 16 | 20 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 11 | 14 |
| Precipitation (mm) | 87 | 62 | 61 | 68 | 69 | 72 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 25 | 20 | 14 | 11 |
| Avg temp (°C) | 22 | 22 | 19 | 15 | 10 | 8 |
| Avg low (°C) | 16 | 16 | 13 | 10 | 6 | 4 |
| Precipitation (mm) | 45 | 54 | 78 | 79 | 102 | 102 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 65 | 64 | 66 | 67 | 61 | 55 | 54 | 55 | 64 | 69 | 70 |
| Relative humidity (%) | 90 | 86 | 81 | 78 | 76 | 73 | 70 | 68 | 70 | 80 | 87 | 90 |
| Wind speed (m/s) | 2.0 | 2.0 | 2.0 | 2.0 | 1.8 | 1.7 | 1.7 | 1.6 | 1.7 | 1.8 | 1.9 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 65 | 64 | 66 | 67 | 61 |
| Relative humidity (%) | 90 | 86 | 81 | 78 | 76 | 73 |
| Wind speed (m/s) | 2.0 | 2.0 | 2.0 | 2.0 | 1.8 | 1.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 54 | 55 | 64 | 69 | 70 |
| Relative humidity (%) | 70 | 68 | 70 | 80 | 87 | 90 |
| Wind speed (m/s) | 1.7 | 1.6 | 1.7 | 1.8 | 1.9 | 1.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Bordeaux Merignac, a weather station, about 41 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.