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Castries vs San Jose
Comparing Castries change · San Jose change
Castries is the warmer of the two — about 12°C on the annual average; Castries is the wetter, with 1399 mm more rain a year, and San Jose the sunnier.
How the seasons compare
The differences between Castries and San Jose, in everyday terms.
Summers
Summers are nearly the same
Castries: Warm
San Jose: Warm
Winters
Castries has far milder winters
Castries: Stays warm
San Jose: Chilly
Rain & snow
Castries is much wetter
Castries: Very wet
San Jose: Moderate rainfall
Sky
San Jose is sunnier
Castries: Fairly sunny
San Jose: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 12°C on the annual average.
Precipitation
Castries is the wetter — about 1399 mm more across the year.
Clear skies
San Jose 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 |
| San Jose | 15 | 17 | 19 | 21 | 24 | 28 | 29 | 29 | 28 | 24 | 18 | 14 |
| Difference | -12 | -10 | -8 | -6 | -4 | -1 | +1 | — | -1 | -4 | -10 | -13 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| San Jose | 15 | 17 | 19 | 21 | 24 | 28 |
| Difference | -12 | -10 | -8 | -6 | -4 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| San Jose | 29 | 29 | 28 | 24 | 18 | 14 |
| Difference | +1 | — | -1 | -4 | -10 | -13 |
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 |
| San Jose | 4 | 5 | 6 | 7 | 10 | 11 | 13 | 13 | 12 | 9 | 6 | 4 |
| Difference | -21 | -20 | -19 | -19 | -17 | -16 | -14 | -14 | -16 | -18 | -21 | -22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| San Jose | 4 | 5 | 6 | 7 | 10 | 11 |
| Difference | -21 | -20 | -19 | -19 | -17 | -16 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| San Jose | 13 | 13 | 12 | 9 | 6 | 4 |
| Difference | -14 | -14 | -16 | -18 | -21 | -22 |
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 |
| San Jose | 128 | 124 | 87 | 35 | 13 | 4 | 0 | 1 | 1 | 19 | 50 | 101 |
| Difference | +14 | +49 | +21 | -55 | -100 | -130 | -216 | -291 | -223 | -227 | -193 | -49 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| San Jose | 128 | 124 | 87 | 35 | 13 | 4 |
| Difference | +14 | +49 | +21 | -55 | -100 | -130 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| San Jose | 0 | 1 | 1 | 19 | 50 | 101 |
| Difference | -216 | -291 | -223 | -227 | -193 | -49 |
Cloud cover (%) Varies through 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 |
| San Jose | 55 | 53 | 49 | 42 | 33 | 20 | 14 | 14 | 16 | 26 | 41 | 52 |
| Difference | +17 | +14 | +7 | -7 | -19 | -39 | -36 | -32 | -35 | -25 | -5 | +12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| San Jose | 55 | 53 | 49 | 42 | 33 | 20 |
| Difference | +17 | +14 | +7 | -7 | -19 | -39 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| San Jose | 14 | 14 | 16 | 26 | 41 | 52 |
| Difference | -36 | -32 | -35 | -25 | -5 | +12 |
Relative humidity (%) Varies through 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 |
| San Jose | 83 | 83 | 82 | 79 | 76 | 71 | 69 | 69 | 67 | 68 | 75 | 80 |
| Difference | +7 | +9 | +8 | +3 | -2 | -7 | -9 | -10 | -11 | -11 | -4 | +3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| San Jose | 83 | 83 | 82 | 79 | 76 | 71 |
| Difference | +7 | +9 | +8 | +3 | -2 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| San Jose | 69 | 69 | 67 | 68 | 75 | 80 |
| Difference | -9 | -10 | -11 | -11 | -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. Castries trends → · San Jose 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.
San Jose
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Los Gatos (NOAA GHCN station USC00045123), about 13 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.
← change Castries · change San Jose → · Castries page · San Jose page