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St. Moritz vs Castries
Comparing St. Moritz change · Castries change
Castries is the warmer of the two — about 25°C on the annual average; Castries is the wetter, with 1252 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between St. Moritz and Castries, in everyday terms.
Summers
Castries has far hotter summers
St. Moritz: Mild
Castries: Warm
Winters
Castries has far milder winters
St. Moritz: Bitterly cold
Castries: Stays warm
Rain & snow
Castries is much wetter
St. Moritz: Moderate rainfall
Castries: Very wet
Sky
Castries is sunnier
St. Moritz: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 25°C on the annual average.
Precipitation
Castries is the wetter — about 1252 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Moritz | -1 | 0 | 4 | 8 | 13 | 17 | 19 | 19 | 15 | 11 | 4 | -1 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +28 | +26 | +23 | +20 | +15 | +11 | +9 | +10 | +14 | +18 | +24 | +28 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| St. Moritz | -1 | 0 | 4 | 8 | 13 | 17 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +28 | +26 | +23 | +20 | +15 | +11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| St. Moritz | 19 | 19 | 15 | 11 | 4 | -1 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +9 | +10 | +14 | +18 | +24 | +28 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Moritz | -16 | -16 | -10 | -4 | 0 | 3 | 5 | 5 | 1 | -3 | -8 | -13 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +41 | +41 | +35 | +30 | +27 | +24 | +23 | +23 | +26 | +30 | +35 | +40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| St. Moritz | -16 | -16 | -10 | -4 | 0 | 3 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +41 | +41 | +35 | +30 | +27 | +24 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| St. Moritz | 5 | 5 | 1 | -3 | -8 | -13 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +23 | +23 | +26 | +30 | +35 | +40 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Moritz | 29 | 19 | 24 | 37 | 67 | 91 | 87 | 100 | 73 | 77 | 70 | 37 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +84 | +57 | +43 | +53 | +47 | +43 | +129 | +191 | +151 | +170 | +173 | +113 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| St. Moritz | 29 | 19 | 24 | 37 | 67 | 91 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +84 | +57 | +43 | +53 | +47 | +43 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| St. Moritz | 87 | 100 | 73 | 77 | 70 | 37 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +129 | +191 | +151 | +170 | +173 | +113 |
Cloud cover (%) St. Moritz runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Moritz | 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 |
|---|---|---|---|---|---|---|
| St. Moritz | 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 |
|---|---|---|---|---|---|---|
| St. Moritz | 62 | 61 | 63 | 65 | 70 | 70 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -12 | -15 | -13 | -14 | -24 | -29 |
Relative humidity (%) St. Moritz runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| St. Moritz | 86 | 88 | 90 | 84 | 79 | 77 | 77 | 78 | 81 | 83 | 88 | 87 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -11 | -13 | -15 | -8 | -2 | +1 | +2 | +1 | -2 | -4 | -9 | -10 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| St. Moritz | 86 | 88 | 90 | 84 | 79 | 77 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -11 | -13 | -15 | -8 | -2 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| St. Moritz | 77 | 78 | 81 | 83 | 88 | 87 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +2 | +1 | -2 | -4 | -9 | -10 |
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. St. Moritz trends → · Castries trends →
Methodology & sources
St. Moritz
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Samedan, about 4 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 St. Moritz · change Castries → · St. Moritz page · Castries page