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Arosa vs Castries
Comparing Arosa change · Castries change
Castries is the warmer of the two — about 24°C on the annual average; Castries is the wetter, with 783 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Arosa and Castries, in everyday terms.
Summers
Castries has far hotter summers
Arosa: Cool
Castries: Warm
Winters
Castries has far milder winters
Arosa: Very cold
Castries: Stays warm
Rain & snow
Castries is wetter
Arosa: Wet
Castries: Very wet
Sky
Castries is sunnier
Arosa: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 24°C on the annual average.
Precipitation
Castries is the wetter — about 783 mm 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 (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | -0 | -0 | 2 | 5 | 10 | 14 | 16 | 16 | 12 | 9 | 3 | 0 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +27 | +27 | +25 | +22 | +18 | +15 | +13 | +13 | +17 | +20 | +25 | +27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | -0 | -0 | 2 | 5 | 10 | 14 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +27 | +27 | +25 | +22 | +18 | +15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 16 | 16 | 12 | 9 | 3 | 0 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +13 | +13 | +17 | +20 | +25 | +27 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | -7 | -8 | -5 | -2 | 3 | 6 | 8 | 8 | 5 | 2 | -3 | -6 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +32 | +33 | +30 | +28 | +24 | +21 | +19 | +19 | +23 | +26 | +30 | +32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | -7 | -8 | -5 | -2 | 3 | 6 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +32 | +33 | +30 | +28 | +24 | +21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 8 | 8 | 5 | 2 | -3 | -6 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +19 | +19 | +23 | +26 | +30 | +32 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 77 | 65 | 73 | 77 | 97 | 132 | 136 | 158 | 104 | 90 | 90 | 80 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +36 | +11 | -7 | +13 | +17 | +1 | +80 | +134 | +120 | +157 | +153 | +69 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 77 | 65 | 73 | 77 | 97 | 132 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +36 | +11 | -7 | +13 | +17 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 136 | 158 | 104 | 90 | 90 | 80 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +80 | +134 | +120 | +157 | +153 | +69 |
Cloud cover (%) Arosa runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 68 | 70 | 72 | 75 | 75 | 69 | 62 | 61 | 63 | 65 | 70 | 70 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -29 | -31 | -30 | -25 | -23 | -11 | -12 | -15 | -13 | -14 | -24 | -29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 68 | 70 | 72 | 75 | 75 | 69 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -29 | -31 | -30 | -25 | -23 | -11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 62 | 61 | 63 | 65 | 70 | 70 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -12 | -15 | -13 | -14 | -24 | -29 |
Relative humidity (%) Arosa runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 88 | 89 | 87 | 80 | 79 | 79 | 80 | 81 | 83 | 84 | 87 | 88 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -13 | -14 | -12 | -4 | -1 | -1 | -1 | -2 | -4 | -5 | -8 | -11 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 88 | 89 | 87 | 80 | 79 | 79 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -13 | -14 | -12 | -4 | -1 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 80 | 81 | 83 | 84 | 87 | 88 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -1 | -2 | -4 | -5 | -8 | -11 |
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. Arosa trends → · Castries trends →
Methodology & sources
Arosa
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Arosa, about 2 km from the city centre.
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 Arosa · change Castries → · Arosa page · Castries page