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Zermatt vs Castries
Comparing Zermatt change · Castries change
Castries is the warmer of the two — about 41°F on the annual average; Castries is the wetter, with 52 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Zermatt and Castries, in everyday terms.
Summers
Castries has far hotter summers
Zermatt: Mild
Castries: Warm
Winters
Castries has far milder winters
Zermatt: Very cold
Castries: Stays warm
Rain & snow
Castries is much wetter
Zermatt: Moderate rainfall
Castries: Very wet
Sky
Castries is sunnier
Zermatt: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 41°F on the annual average.
Precipitation
Castries is the wetter — about 52 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zermatt | 33 | 35 | 42 | 50 | 57 | 64 | 68 | 67 | 60 | 52 | 41 | 35 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +47 | +45 | +38 | +32 | +26 | +19 | +15 | +17 | +24 | +31 | +41 | +47 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Zermatt | 33 | 35 | 42 | 50 | 57 | 64 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +47 | +45 | +38 | +32 | +26 | +19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Zermatt | 68 | 67 | 60 | 52 | 41 | 35 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +15 | +17 | +24 | +31 | +41 | +47 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zermatt | 19 | 19 | 25 | 31 | 38 | 44 | 47 | 47 | 41 | 35 | 26 | 21 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +59 | +59 | +53 | +48 | +42 | +37 | +34 | +35 | +41 | +47 | +54 | +59 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Zermatt | 19 | 19 | 25 | 31 | 38 | 44 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +59 | +59 | +53 | +48 | +42 | +37 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Zermatt | 47 | 47 | 41 | 35 | 26 | 21 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +34 | +35 | +41 | +47 | +54 | +59 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zermatt | 1.7 | 1.2 | 1.3 | 1.6 | 3 | 2.8 | 2.3 | 2.7 | 2 | 2.2 | 2.6 | 1.9 |
| 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 | +2.8 | +1.8 | +1.3 | +2 | +1.4 | +2.5 | +6.2 | +8.8 | +6.8 | +7.5 | +7 | +4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Zermatt | 1.7 | 1.2 | 1.3 | 1.6 | 3 | 2.8 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +2.8 | +1.8 | +1.3 | +2 | +1.4 | +2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Zermatt | 2.3 | 2.7 | 2 | 2.2 | 2.6 | 1.9 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +6.2 | +8.8 | +6.8 | +7.5 | +7 | +4 |
Cloud cover (%) Zermatt runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zermatt | 68 | 69 | 68 | 69 | 72 | 65 | 59 | 59 | 61 | 66 | 71 | 71 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -30 | -30 | -27 | -20 | -20 | -7 | -10 | -12 | -10 | -15 | -25 | -31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Zermatt | 68 | 69 | 68 | 69 | 72 | 65 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -30 | -30 | -27 | -20 | -20 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Zermatt | 59 | 59 | 61 | 66 | 71 | 71 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -10 | -12 | -10 | -15 | -25 | -31 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zermatt | 83 | 83 | 86 | 82 | 78 | 75 | 74 | 75 | 78 | 80 | 85 | 83 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -7 | -9 | -11 | -6 | — | +3 | +4 | +4 | +1 | -1 | -6 | -6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Zermatt | 83 | 83 | 86 | 82 | 78 | 75 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -7 | -9 | -11 | -6 | — | +3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Zermatt | 74 | 75 | 78 | 80 | 85 | 83 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +4 | +4 | +1 | -1 | -6 | -6 |
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. Zermatt trends → · Castries trends →
Methodology & sources
Zermatt
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Zermatt, about 1 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 Zermatt · change Castries → · Zermatt page · Castries page