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Castries vs London
Comparing Castries change · London change
Castries is the warmer of the two — about 30°F on the annual average; Castries is the wetter, with 48 in 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 30°F on the annual average.
Precipitation
Castries is the wetter — about 48 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| London | 46 | 47 | 52 | 57 | 63 | 68 | 73 | 72 | 66 | 59 | 51 | 46 |
| Difference | -35 | -33 | -29 | -24 | -20 | -15 | -11 | -12 | -18 | -25 | -31 | -35 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| London | 46 | 47 | 52 | 57 | 63 | 68 |
| Difference | -35 | -33 | -29 | -24 | -20 | -15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| London | 73 | 72 | 66 | 59 | 51 | 46 |
| Difference | -11 | -12 | -18 | -25 | -31 | -35 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| London | 36 | 36 | 38 | 42 | 47 | 52 | 56 | 56 | 52 | 47 | 41 | 36 |
| Difference | -42 | -42 | -39 | -37 | -33 | -29 | -25 | -26 | -30 | -35 | -40 | -43 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| London | 36 | 36 | 38 | 42 | 47 | 52 |
| Difference | -42 | -42 | -39 | -37 | -33 | -29 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| London | 56 | 56 | 52 | 47 | 41 | 36 |
| Difference | -25 | -26 | -30 | -35 | -40 | -43 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| London | 2.9 | 2 | 1.8 | 2.1 | 2.1 | 2.3 | 2.1 | 2.7 | 2.5 | 3.1 | 3 | 2.7 |
| Difference | -1.5 | -1 | -0.8 | -1.4 | -2.3 | -3 | -6.5 | -8.8 | -6.4 | -6.6 | -6.5 | -3.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| London | 2.9 | 2 | 1.8 | 2.1 | 2.1 | 2.3 |
| Difference | -1.5 | -1 | -0.8 | -1.4 | -2.3 | -3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| London | 2.1 | 2.7 | 2.5 | 3.1 | 3 | 2.7 |
| Difference | -6.5 | -8.8 | -6.4 | -6.6 | -6.5 | -3.2 |
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