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Biarritz vs Castries
Comparing Biarritz change · Castries change
Castries is the warmer of the two — about 23°F on the annual average; Castries is the wetter, with 19 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Biarritz and Castries, in everyday terms.
Summers
Castries has hotter summers
Biarritz: Mild
Castries: Warm
Winters
Castries has far milder winters
Biarritz: Cool
Castries: Stays warm
Rain & snow
Castries is wetter
Biarritz: Wet
Castries: Very wet
Sky
Castries is sunnier
Biarritz: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 23°F on the annual average.
Precipitation
Castries is the wetter — about 19 in more across the year.
Clear skies
Castries has the clearer skies — the higher line.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biarritz | 54 | 55 | 59 | 62 | 68 | 72 | 76 | 77 | 74 | 68 | 60 | 55 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +26 | +25 | +21 | +19 | +15 | +11 | +8 | +7 | +10 | +15 | +23 | +26 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Biarritz | 54 | 55 | 59 | 62 | 68 | 72 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +26 | +25 | +21 | +19 | +15 | +11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Biarritz | 76 | 77 | 74 | 68 | 60 | 55 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +8 | +7 | +10 | +15 | +23 | +26 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biarritz | 41 | 41 | 45 | 48 | 53 | 59 | 62 | 63 | 58 | 53 | 46 | 42 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +37 | +37 | +33 | +31 | +27 | +22 | +19 | +19 | +24 | +28 | +35 | +37 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Biarritz | 41 | 41 | 45 | 48 | 53 | 59 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +37 | +37 | +33 | +31 | +27 | +22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Biarritz | 62 | 63 | 58 | 53 | 46 | 42 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +19 | +19 | +24 | +28 | +35 | +37 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biarritz | 5.5 | 4.3 | 4 | 4.6 | 4.6 | 3.9 | 3 | 3.4 | 4.7 | 5.8 | 8.1 | 5.9 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | -1 | -1.4 | -1.4 | -1.1 | -0.1 | +1.4 | +5.5 | +8 | +4.2 | +3.9 | +1.4 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Biarritz | 5.5 | 4.3 | 4 | 4.6 | 4.6 | 3.9 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | -1 | -1.4 | -1.4 | -1.1 | -0.1 | +1.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Biarritz | 3 | 3.4 | 4.7 | 5.8 | 8.1 | 5.9 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +5.5 | +8 | +4.2 | +3.9 | +1.4 | — |
Cloud cover (%) Biarritz runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biarritz | 73 | 69 | 67 | 70 | 70 | 66 | 63 | 62 | 61 | 68 | 73 | 73 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -35 | -30 | -26 | -21 | -18 | -8 | -13 | -16 | -11 | -16 | -27 | -33 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Biarritz | 73 | 69 | 67 | 70 | 70 | 66 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -35 | -30 | -26 | -21 | -18 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Biarritz | 63 | 62 | 61 | 68 | 73 | 73 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -13 | -16 | -11 | -16 | -27 | -33 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biarritz | 86 | 84 | 82 | 80 | 79 | 77 | 74 | 70 | 72 | 78 | 84 | 86 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -11 | -9 | -7 | -4 | -2 | +1 | +5 | +9 | +7 | +2 | -5 | -9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Biarritz | 86 | 84 | 82 | 80 | 79 | 77 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -11 | -9 | -7 | -4 | -2 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Biarritz | 74 | 70 | 72 | 78 | 84 | 86 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +5 | +9 | +7 | +2 | -5 | -9 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Biarritz trends → · Castries trends →
Methodology & sources
Biarritz
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Biarritz-pays-basque, a weather station, about 2 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.
Castries
Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 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.
← change Biarritz · change Castries → · Biarritz page · Castries page