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Bayonne, Nouvelle-Aquitaine climate
Cfb Oceanic / temperate
Bayonne has a mildly seasonal mild-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 77°F, while the coldest is January averaging around 41°F at night. Around 58 inches of precipitation falls each year, peaking in November (8.1 inches) and easing off in July (3.0 inches).
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)Bayonne climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 54 | 55 | 59 | 62 | 68 | 72 | 76 | 77 | 74 | 68 | 60 | 55 |
| Avg temp (°F) | 47 | 48 | 52 | 55 | 61 | 66 | 69 | 70 | 66 | 61 | 53 | 49 |
| Avg low (°F) | 41 | 41 | 45 | 48 | 53 | 59 | 62 | 63 | 58 | 53 | 46 | 42 |
| Precipitation (in) | 5.5 | 4.3 | 4.0 | 4.6 | 4.6 | 3.9 | 3.0 | 3.4 | 4.7 | 5.8 | 8.1 | 5.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 54 | 55 | 59 | 62 | 68 | 72 |
| Avg temp (°F) | 47 | 48 | 52 | 55 | 61 | 66 |
| Avg low (°F) | 41 | 41 | 45 | 48 | 53 | 59 |
| Precipitation (in) | 5.5 | 4.3 | 4.0 | 4.6 | 4.6 | 3.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 76 | 77 | 74 | 68 | 60 | 55 |
| Avg temp (°F) | 69 | 70 | 66 | 61 | 53 | 49 |
| Avg low (°F) | 62 | 63 | 58 | 53 | 46 | 42 |
| Precipitation (in) | 3.0 | 3.4 | 4.7 | 5.8 | 8.1 | 5.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 67 | 70 | 70 | 66 | 63 | 62 | 61 | 68 | 73 | 73 |
| Relative humidity (%) | 86 | 84 | 82 | 80 | 79 | 77 | 74 | 70 | 72 | 78 | 84 | 86 |
| Wind speed (mph) | 5.7 | 5.6 | 5.4 | 5.4 | 4.9 | 4.8 | 4.8 | 4.6 | 4.6 | 5.1 | 5.6 | 5.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 67 | 70 | 70 | 66 |
| Relative humidity (%) | 86 | 84 | 82 | 80 | 79 | 77 |
| Wind speed (mph) | 5.7 | 5.6 | 5.4 | 5.4 | 4.9 | 4.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 63 | 62 | 61 | 68 | 73 | 73 |
| Relative humidity (%) | 74 | 70 | 72 | 78 | 84 | 86 |
| Wind speed (mph) | 4.8 | 4.6 | 4.6 | 5.1 | 5.6 | 5.8 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Biarritz-pays-basque, a weather station, about 6 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.