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Castries vs San Diego
Comparing Castries change · San Diego change
Castries is the warmer of the two — about 19°F on the annual average; Castries is the wetter, with 69 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and San Diego, in everyday terms.
Summers
Castries has much hotter summers
Castries: Warm
San Diego: Mild
Winters
Castries has far milder winters
Castries: Stays warm
San Diego: Cool
Rain & snow
Castries is much wetter
Castries: Very wet
San Diego: Very dry
Sky
Castries is sunnier
Castries: Fairly sunny
San Diego: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 19°F on the annual average.
Precipitation
Castries is the wetter — about 69 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 |
| San Diego | 67 | 65 | 66 | 67 | 68 | 70 | 73 | 75 | 75 | 73 | 70 | 66 |
| Difference | -13 | -15 | -15 | -15 | -15 | -13 | -10 | -9 | -9 | -10 | -13 | -15 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| San Diego | 67 | 65 | 66 | 67 | 68 | 70 |
| Difference | -13 | -15 | -15 | -15 | -15 | -13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| San Diego | 73 | 75 | 75 | 73 | 70 | 66 |
| Difference | -10 | -9 | -9 | -10 | -13 | -15 |
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 |
| San Diego | 47 | 48 | 51 | 53 | 57 | 60 | 64 | 65 | 62 | 56 | 50 | 46 |
| Difference | -31 | -30 | -26 | -26 | -24 | -21 | -17 | -17 | -20 | -25 | -30 | -33 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| San Diego | 47 | 48 | 51 | 53 | 57 | 60 |
| Difference | -31 | -30 | -26 | -26 | -24 | -21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| San Diego | 64 | 65 | 62 | 56 | 50 | 46 |
| Difference | -17 | -17 | -20 | -25 | -30 | -33 |
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 |
| San Diego | 1.7 | 2.1 | 1.9 | 0.6 | 0.1 | 0.1 | 0.3 | 0 | 0.1 | 0.4 | 0.8 | 0.5 |
| Difference | -2.8 | -0.9 | -0.8 | -2.9 | -4.4 | -5.2 | -8.2 | -11.4 | -8.7 | -9.3 | -8.8 | -5.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| San Diego | 1.7 | 2.1 | 1.9 | 0.6 | 0.1 | 0.1 |
| Difference | -2.8 | -0.9 | -0.8 | -2.9 | -4.4 | -5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| San Diego | 0.3 | 0 | 0.1 | 0.4 | 0.8 | 0.5 |
| Difference | -8.2 | -11.4 | -8.7 | -9.3 | -8.8 | -5.4 |
Cloud cover (%) San Diego 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 |
| San Diego | 51 | 56 | 58 | 55 | 66 | 73 | 69 | 61 | 56 | 53 | 46 | 48 |
| Difference | +12 | +18 | +16 | +6 | +14 | +14 | +19 | +15 | +5 | +2 | — | +7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| San Diego | 51 | 56 | 58 | 55 | 66 | 73 |
| Difference | +12 | +18 | +16 | +6 | +14 | +14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| San Diego | 69 | 61 | 56 | 53 | 46 | 48 |
| Difference | +19 | +15 | +5 | +2 | — | +7 |
Relative humidity (%) Castries 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 |
| San Diego | 65 | 68 | 69 | 67 | 68 | 64 | 59 | 56 | 58 | 60 | 59 | 63 |
| Difference | -11 | -7 | -6 | -9 | -9 | -15 | -20 | -23 | -21 | -20 | -20 | -14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| San Diego | 65 | 68 | 69 | 67 | 68 | 64 |
| Difference | -11 | -7 | -6 | -9 | -9 | -15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| San Diego | 59 | 56 | 58 | 60 | 59 | 63 |
| Difference | -20 | -23 | -21 | -20 | -20 | -14 |
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 Diego trends →
San Diego from BSk to BSh.
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 Diego
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Imperial Beach Ream Fld Nas (NOAA GHCN station USW00093115), about 17 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 Diego → · Castries page · San Diego page