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Castries vs Phoenix
Comparing Castries change · Phoenix change
Castries is the warmer of the two — about 3°C on the annual average; Castries is the wetter, with 1779 mm more rain a year, and Phoenix the sunnier.
How the seasons compare
The differences between Castries and Phoenix, in everyday terms.
Summers
Phoenix has far hotter summers
Castries: Warm
Phoenix: Extreme heat
Winters
Castries has far milder winters
Castries: Stays warm
Phoenix: Cool
Rain & snow
Castries is much wetter
Castries: Very wet
Phoenix: Very dry
Sky
Phoenix is sunnier
Castries: Fairly sunny
Phoenix: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 3°C on the annual average.
Precipitation
Castries is the wetter — about 1779 mm more across the year.
Clear skies
Phoenix 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Phoenix | 20 | 22 | 26 | 30 | 35 | 40 | 41 | 41 | 38 | 32 | 25 | 19 |
| Difference | -7 | -5 | -1 | +2 | +7 | +12 | +13 | +12 | +9 | +3 | -3 | -8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Phoenix | 20 | 22 | 26 | 30 | 35 | 40 |
| Difference | -7 | -5 | -1 | +2 | +7 | +12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Phoenix | 41 | 41 | 38 | 32 | 25 | 19 |
| Difference | +13 | +12 | +9 | +3 | -3 | -8 |
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 |
| Phoenix | 8 | 9 | 13 | 16 | 21 | 26 | 29 | 29 | 26 | 19 | 12 | 7 |
| Difference | -18 | -16 | -13 | -10 | -6 | -1 | +2 | +1 | -2 | -9 | -15 | -19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Phoenix | 8 | 9 | 13 | 16 | 21 | 26 |
| Difference | -18 | -16 | -13 | -10 | -6 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Phoenix | 29 | 29 | 26 | 19 | 12 | 7 |
| Difference | +2 | +1 | -2 | -9 | -15 | -19 |
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 |
| Phoenix | 22 | 22 | 21 | 6 | 3 | 1 | 23 | 24 | 14 | 14 | 14 | 19 |
| Difference | -91 | -54 | -45 | -84 | -110 | -133 | -193 | -268 | -210 | -232 | -228 | -131 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Phoenix | 22 | 22 | 21 | 6 | 3 | 1 |
| Difference | -91 | -54 | -45 | -84 | -110 | -133 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Phoenix | 23 | 24 | 14 | 14 | 14 | 19 |
| Difference | -193 | -268 | -210 | -232 | -228 | -131 |
Cloud cover (%) Castries 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 |
| Phoenix | 42 | 44 | 38 | 31 | 26 | 20 | 43 | 42 | 28 | 27 | 33 | 42 |
| Difference | +4 | +5 | -4 | -18 | -27 | -39 | -6 | -4 | -23 | -24 | -13 | +1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Phoenix | 42 | 44 | 38 | 31 | 26 | 20 |
| Difference | +4 | +5 | -4 | -18 | -27 | -39 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Phoenix | 43 | 42 | 28 | 27 | 33 | 42 |
| Difference | -6 | -4 | -23 | -24 | -13 | +1 |
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 |
| Phoenix | 47 | 45 | 40 | 31 | 23 | 16 | 29 | 35 | 32 | 30 | 35 | 45 |
| Difference | -29 | -29 | -35 | -45 | -54 | -62 | -49 | -44 | -47 | -49 | -44 | -32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Phoenix | 47 | 45 | 40 | 31 | 23 | 16 |
| Difference | -29 | -29 | -35 | -45 | -54 | -62 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Phoenix | 29 | 35 | 32 | 30 | 35 | 45 |
| Difference | -49 | -44 | -47 | -49 | -44 | -32 |
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 → · Phoenix trends →
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.
Phoenix
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Phoenix AP (NOAA GHCN station USW00023183), about 7 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 Phoenix → · Castries page · Phoenix page