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Castries vs London
Comparing Castries change · London change
Castries is the warmer of the two — about 16°C on the annual average; Castries is the wetter, with 1218 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and London, in everyday terms.
Summers
Castries has much hotter summers
Castries: Warm
London: Mild
Winters
Castries has far milder winters
Castries: Stays warm
London: Chilly
Rain & snow
Castries is much wetter
Castries: Very wet
London: Moderate rainfall
Sky
Castries is far sunnier
Castries: Fairly sunny
London: Often cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 16°C on the annual average.
Precipitation
Castries is the wetter — about 1218 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| London | 8 | 8 | 11 | 14 | 17 | 20 | 23 | 22 | 19 | 15 | 11 | 8 |
| Difference | -19 | -19 | -16 | -13 | -11 | -8 | -6 | -7 | -10 | -14 | -17 | -19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| London | 8 | 8 | 11 | 14 | 17 | 20 |
| Difference | -19 | -19 | -16 | -13 | -11 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| London | 23 | 22 | 19 | 15 | 11 | 8 |
| Difference | -6 | -7 | -10 | -14 | -17 | -19 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| London | 2 | 2 | 4 | 5 | 8 | 11 | 13 | 13 | 11 | 8 | 5 | 2 |
| Difference | -23 | -23 | -22 | -21 | -19 | -16 | -14 | -14 | -17 | -19 | -22 | -24 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| London | 2 | 2 | 4 | 5 | 8 | 11 |
| Difference | -23 | -23 | -22 | -21 | -19 | -16 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| London | 13 | 13 | 11 | 8 | 5 | 2 |
| Difference | -14 | -14 | -17 | -19 | -22 | -24 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| London | 74 | 51 | 45 | 54 | 54 | 58 | 52 | 68 | 62 | 80 | 77 | 69 |
| Difference | -39 | -25 | -22 | -35 | -59 | -76 | -164 | -223 | -162 | -166 | -166 | -81 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| London | 74 | 51 | 45 | 54 | 54 | 58 |
| Difference | -39 | -25 | -22 | -35 | -59 | -76 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| London | 52 | 68 | 62 | 80 | 77 | 69 |
| Difference | -164 | -223 | -162 | -166 | -166 | -81 |
Cloud cover (%) London runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| London | 74 | 74 | 74 | 69 | 69 | 71 | 67 | 68 | 68 | 72 | 75 | 74 |
| Difference | +36 | +35 | +32 | +20 | +17 | +12 | +18 | +22 | +17 | +21 | +28 | +33 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| London | 74 | 74 | 74 | 69 | 69 | 71 |
| Difference | +36 | +35 | +32 | +20 | +17 | +12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| London | 67 | 68 | 68 | 72 | 75 | 74 |
| Difference | +18 | +22 | +17 | +21 | +28 | +33 |
Relative humidity (%) London runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| London | 93 | 90 | 86 | 82 | 79 | 78 | 76 | 77 | 81 | 87 | 92 | 94 |
| Difference | +18 | +16 | +11 | +6 | +2 | — | -3 | -2 | +3 | +8 | +13 | +17 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| London | 93 | 90 | 86 | 82 | 79 | 78 |
| Difference | +18 | +16 | +11 | +6 | +2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| London | 76 | 77 | 81 | 87 | 92 | 94 |
| Difference | -3 | -2 | +3 | +8 | +13 | +17 |
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. Castries trends → · London trends →
Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).
Methodology & sources
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.
London
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Hampstead, a weather station, about 22 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 Castries · change London → · Castries page · London page