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Arosa vs Castries
Comparing Arosa change · Castries change
Castries is the warmer of the two — about 42°F on the annual average; Castries is the wetter, with 31 in 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 42°F on the annual average.
Precipitation
Castries is the wetter — about 31 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 31 | 31 | 36 | 41 | 49 | 57 | 60 | 60 | 53 | 47 | 38 | 32 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +49 | +49 | +45 | +40 | +33 | +26 | +23 | +24 | +31 | +36 | +44 | +49 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 31 | 31 | 36 | 41 | 49 | 57 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +49 | +49 | +45 | +40 | +33 | +26 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 60 | 60 | 53 | 47 | 38 | 32 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +23 | +24 | +31 | +36 | +44 | +49 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 20 | 19 | 23 | 29 | 37 | 42 | 46 | 47 | 40 | 35 | 27 | 22 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +58 | +59 | +55 | +50 | +44 | +38 | +35 | +35 | +42 | +47 | +54 | +58 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 20 | 19 | 23 | 29 | 37 | 42 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +58 | +59 | +55 | +50 | +44 | +38 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 46 | 47 | 40 | 35 | 27 | 22 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +35 | +35 | +42 | +47 | +54 | +58 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arosa | 3 | 2.5 | 2.9 | 3 | 3.8 | 5.2 | 5.4 | 6.2 | 4.1 | 3.5 | 3.5 | 3.2 |
| 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 | +1.4 | +0.4 | -0.3 | +0.5 | +0.7 | +0.1 | +3.2 | +5.3 | +4.7 | +6.2 | +6 | +2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Arosa | 3 | 2.5 | 2.9 | 3 | 3.8 | 5.2 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +1.4 | +0.4 | -0.3 | +0.5 | +0.7 | +0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Arosa | 5.4 | 6.2 | 4.1 | 3.5 | 3.5 | 3.2 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +3.2 | +5.3 | +4.7 | +6.2 | +6 | +2.7 |
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