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Buenos Aires vs Castries
Comparing Buenos Aires change · Castries change
Castries is the warmer of the two — about 9°C on the annual average; Castries is the wetter, with 897 mm more rain a year.
How the seasons compare
The differences between Buenos Aires and Castries, in everyday terms.
Summers
Summers are nearly the same
Buenos Aires: Warm
Castries: Warm
Winters
Castries has far milder winters
Buenos Aires: Cool
Castries: Stays warm
Rain & snow
Castries is wetter
Buenos Aires: Wet
Castries: Very wet
Sky
Similar amounts of sun
Buenos Aires: Partly cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 9°C on the annual average.
Precipitation
Castries is the wetter — about 897 mm more across the year.
Clear skies
The two cities see a similar amount of sun.
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Buenos Aires | 29 | 28 | 26 | 23 | 19 | 16 | 15 | 17 | 19 | 22 | 25 | 28 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | -2 | -1 | +1 | +5 | +9 | +12 | +13 | +12 | +10 | +7 | +3 | -1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Buenos Aires | 29 | 28 | 26 | 23 | 19 | 16 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | -2 | -1 | +1 | +5 | +9 | +12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Buenos Aires | 15 | 17 | 19 | 22 | 25 | 28 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +13 | +12 | +10 | +7 | +3 | -1 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Buenos Aires | 21 | 20 | 19 | 15 | 12 | 9 | 8 | 9 | 11 | 14 | 17 | 19 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +5 | +5 | +7 | +11 | +15 | +18 | +19 | +18 | +17 | +13 | +10 | +7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Buenos Aires | 21 | 20 | 19 | 15 | 12 | 9 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +5 | +5 | +7 | +11 | +15 | +18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Buenos Aires | 8 | 9 | 11 | 14 | 17 | 19 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +19 | +18 | +17 | +13 | +10 | +7 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Buenos Aires | 105 | 111 | 103 | 106 | 83 | 53 | 61 | 63 | 68 | 123 | 94 | 95 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +8 | -35 | -37 | -16 | +31 | +80 | +155 | +229 | +156 | +123 | +148 | +55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Buenos Aires | 105 | 111 | 103 | 106 | 83 | 53 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +8 | -35 | -37 | -16 | +31 | +80 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Buenos Aires | 61 | 63 | 68 | 123 | 94 | 95 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +155 | +229 | +156 | +123 | +148 | +55 |
Cloud cover (%) Buenos Aires runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Buenos Aires | 47 | 47 | 46 | 51 | 56 | 58 | 59 | 54 | 55 | 55 | 50 | 46 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -8 | -8 | -4 | -2 | -4 | +1 | -9 | -8 | -4 | -4 | -3 | -6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Buenos Aires | 47 | 47 | 46 | 51 | 56 | 58 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -8 | -8 | -4 | -2 | -4 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Buenos Aires | 59 | 54 | 55 | 55 | 50 | 46 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -9 | -8 | -4 | -4 | -3 | -6 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Buenos Aires | 69 | 71 | 74 | 76 | 80 | 81 | 82 | 80 | 78 | 76 | 72 | 69 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +7 | +3 | +1 | — | -2 | -3 | -3 | -1 | +1 | +3 | +7 | +8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Buenos Aires | 69 | 71 | 74 | 76 | 80 | 81 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | +7 | +3 | +1 | — | -2 | -3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Buenos Aires | 82 | 80 | 78 | 76 | 72 | 69 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -3 | -1 | +1 | +3 | +7 | +8 |
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. Buenos Aires trends → · Castries trends →
Methodology & sources
Buenos Aires
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Aeroparque Jorge Newbery, a weather station, about 7 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 Buenos Aires · change Castries → · Buenos Aires page · Castries page