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Jeju City vs Castries
Comparing Jeju City change · Castries change
Castries is the warmer of the two — about 20°F on the annual average; Castries is the wetter, with 14 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Jeju City and Castries, in everyday terms.
Summers
Summers are nearly the same
Jeju City: Warm
Castries: Warm
Winters
Castries has far milder winters
Jeju City: Chilly
Castries: Stays warm
Rain & snow
Castries is wetter
Jeju City: Very wet
Castries: Very wet
Sky
Castries is far sunnier
Jeju City: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 20°F on the annual average.
Precipitation
Castries is the wetter — about 14 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeju City | 47 | 49 | 56 | 64 | 71 | 77 | 85 | 86 | 79 | 71 | 61 | 51 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +33 | +30 | +25 | +17 | +11 | +6 | -1 | -2 | +5 | +13 | +21 | +30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jeju City | 47 | 49 | 56 | 64 | 71 | 77 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +33 | +30 | +25 | +17 | +11 | +6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jeju City | 85 | 86 | 79 | 71 | 61 | 51 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | -1 | -2 | +5 | +13 | +21 | +30 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeju City | 38 | 39 | 43 | 51 | 58 | 66 | 74 | 76 | 69 | 60 | 50 | 42 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +40 | +39 | +35 | +28 | +22 | +15 | +7 | +6 | +13 | +22 | +31 | +38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jeju City | 38 | 39 | 43 | 51 | 58 | 66 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +40 | +39 | +35 | +28 | +22 | +15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jeju City | 74 | 76 | 69 | 60 | 50 | 42 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +7 | +6 | +13 | +22 | +31 | +38 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeju City | 2.7 | 2.4 | 3.6 | 3.6 | 4 | 7.2 | 8.6 | 12.4 | 9.7 | 3.9 | 2.9 | 2.2 |
| 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 | +1.8 | +0.6 | -1 | — | +0.4 | -2 | -0.1 | -0.9 | -0.8 | +5.8 | +6.6 | +3.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jeju City | 2.7 | 2.4 | 3.6 | 3.6 | 4 | 7.2 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +1.8 | +0.6 | -1 | — | +0.4 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jeju City | 8.6 | 12.4 | 9.7 | 3.9 | 2.9 | 2.2 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | -0.1 | -0.9 | -0.8 | +5.8 | +6.6 | +3.7 |
Cloud cover (%) Jeju City runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeju City | 79 | 75 | 72 | 72 | 74 | 81 | 73 | 65 | 66 | 58 | 65 | 75 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -41 | -36 | -30 | -22 | -22 | -22 | -23 | -19 | -15 | -6 | -19 | -34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jeju City | 79 | 75 | 72 | 72 | 74 | 81 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -41 | -36 | -30 | -22 | -22 | -22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jeju City | 73 | 65 | 66 | 58 | 65 | 75 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -23 | -19 | -15 | -6 | -19 | -34 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jeju City | 77 | 75 | 74 | 79 | 85 | 89 | 90 | 85 | 80 | 74 | 74 | 76 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -1 | — | +1 | -3 | -8 | -10 | -12 | -6 | -1 | +5 | +5 | +1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jeju City | 77 | 75 | 74 | 79 | 85 | 89 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -1 | — | +1 | -3 | -8 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jeju City | 90 | 85 | 80 | 74 | 74 | 76 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -12 | -6 | -1 | +5 | +5 | +1 |
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. Jeju City trends → · Castries trends →
Methodology & sources
Jeju City
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Jeju, 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 Jeju City · change Castries → · Jeju City page · Castries page