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Seoul vs Castries
Comparing Seoul change · Castries change
Castries is the warmer of the two — about 14°C on the annual average; Castries is the wetter, with 455 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Seoul and Castries, in everyday terms.
Summers
Summers are nearly the same
Seoul: Warm
Castries: Warm
Winters
Castries has far milder winters
Seoul: Cold
Castries: Stays warm
Rain & snow
Castries is wetter
Seoul: Wet
Castries: Very wet
Sky
Castries is sunnier
Seoul: Partly cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 14°C on the annual average.
Precipitation
Castries is the wetter — about 455 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 2 | 5 | 11 | 18 | 24 | 28 | 29 | 30 | 26 | 20 | 12 | 4 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +25 | +22 | +16 | +10 | +5 | +1 | — | -1 | +3 | +8 | +16 | +23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Seoul | 2 | 5 | 11 | 18 | 24 | 28 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +25 | +22 | +16 | +10 | +5 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Seoul | 29 | 30 | 26 | 20 | 12 | 4 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | — | -1 | +3 | +8 | +16 | +23 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | -6 | -4 | 1 | 7 | 13 | 18 | 22 | 23 | 17 | 10 | 3 | -4 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +32 | +29 | +24 | +19 | +14 | +9 | +5 | +5 | +11 | +18 | +24 | +30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Seoul | -6 | -4 | 1 | 7 | 13 | 18 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +32 | +29 | +24 | +19 | +14 | +9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Seoul | 22 | 23 | 17 | 10 | 3 | -4 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +5 | +5 | +11 | +18 | +24 | +30 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 21 | 32 | 41 | 75 | 104 | 138 | 440 | 362 | 154 | 58 | 56 | 25 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +92 | +43 | +25 | +14 | +10 | -4 | -224 | -71 | +70 | +188 | +187 | +125 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Seoul | 21 | 32 | 41 | 75 | 104 | 138 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +92 | +43 | +25 | +14 | +10 | -4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Seoul | 440 | 362 | 154 | 58 | 56 | 25 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | -224 | -71 | +70 | +188 | +187 | +125 |
Cloud cover (%) Seoul runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 51 | 50 | 52 | 55 | 58 | 67 | 75 | 65 | 56 | 46 | 52 | 51 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -13 | -11 | -10 | -6 | -6 | -8 | -25 | -19 | -5 | +6 | -6 | -11 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Seoul | 51 | 50 | 52 | 55 | 58 | 67 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -13 | -11 | -10 | -6 | -6 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Seoul | 75 | 65 | 56 | 46 | 52 | 51 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -25 | -19 | -5 | +6 | -6 | -11 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seoul | 76 | 74 | 74 | 74 | 75 | 78 | 85 | 84 | 79 | 75 | 76 | 77 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -1 | +1 | +1 | +2 | +2 | +1 | -6 | -5 | -1 | +4 | +3 | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Seoul | 76 | 74 | 74 | 74 | 75 | 78 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -1 | +1 | +1 | +2 | +2 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Seoul | 85 | 84 | 79 | 75 | 76 | 77 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -6 | -5 | -1 | +4 | +3 | — |
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. Seoul trends → · Castries trends →
Methodology & sources
Seoul
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Seoul City, a weather station, about 1 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 Seoul · change Castries → · Seoul page · Castries page