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Alexandria vs Castries
Comparing Alexandria change · Castries change
Castries is the warmer of the two — about 6°C on the annual average; Castries is the wetter, with 1740 mm more rain a year, and Alexandria the sunnier.
How the seasons compare
The differences between Alexandria and Castries, in everyday terms.
Summers
Alexandria has hotter summers
Alexandria: Hot
Castries: Warm
Winters
Castries has far milder winters
Alexandria: Cool
Castries: Stays warm
Rain & snow
Castries is much wetter
Alexandria: Very dry
Castries: Very wet
Sky
Alexandria is sunnier
Alexandria: Fairly sunny
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 6°C on the annual average.
Precipitation
Castries is the wetter — about 1740 mm more across the year.
Clear skies
Alexandria 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) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alexandria | 18 | 19 | 21 | 24 | 27 | 29 | 31 | 31 | 30 | 28 | 24 | 20 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +8 | +8 | +6 | +3 | +1 | -1 | -2 | -2 | -1 | +1 | +4 | +7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Alexandria | 18 | 19 | 21 | 24 | 27 | 29 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +8 | +8 | +6 | +3 | +1 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Alexandria | 31 | 31 | 30 | 28 | 24 | 20 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | -2 | -2 | -1 | +1 | +4 | +7 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alexandria | 9 | 10 | 12 | 14 | 18 | 21 | 24 | 24 | 22 | 19 | 15 | 11 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +16 | +16 | +14 | +12 | +9 | +6 | +4 | +3 | +5 | +8 | +12 | +15 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Alexandria | 9 | 10 | 12 | 14 | 18 | 21 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +16 | +16 | +14 | +12 | +9 | +6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Alexandria | 24 | 24 | 22 | 19 | 15 | 11 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +4 | +3 | +5 | +8 | +12 | +15 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alexandria | 65 | 33 | 17 | 4 | 1 | 0 | 0 | 1 | 1 | 14 | 34 | 53 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +49 | +42 | +49 | +85 | +113 | +134 | +216 | +290 | +223 | +233 | +209 | +96 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Alexandria | 65 | 33 | 17 | 4 | 1 | 0 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +49 | +42 | +49 | +85 | +113 | +134 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Alexandria | 0 | 1 | 1 | 14 | 34 | 53 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +216 | +290 | +223 | +233 | +209 | +96 |
Cloud cover (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alexandria | 58 | 55 | 48 | 42 | 31 | 13 | 9 | 11 | 18 | 34 | 48 | 58 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -19 | -16 | -6 | +7 | +21 | +46 | +41 | +35 | +32 | +17 | -2 | -18 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Alexandria | 58 | 55 | 48 | 42 | 31 | 13 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -19 | -16 | -6 | +7 | +21 | +46 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Alexandria | 9 | 11 | 18 | 34 | 48 | 58 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | +41 | +35 | +32 | +17 | -2 | -18 |
Relative humidity (%) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alexandria | 68 | 66 | 64 | 59 | 59 | 60 | 62 | 63 | 62 | 64 | 66 | 68 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +7 | +9 | +11 | +17 | +19 | +19 | +17 | +16 | +16 | +15 | +13 | +9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Alexandria | 68 | 66 | 64 | 59 | 59 | 60 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | +7 | +9 | +11 | +17 | +19 | +19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Alexandria | 62 | 63 | 62 | 64 | 66 | 68 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +17 | +16 | +16 | +15 | +13 | +9 |
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. Alexandria trends → · Castries trends →
Methodology & sources
Alexandria
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Alexandria Intl, a weather station, about 4 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 Alexandria · change Castries → · Alexandria page · Castries page