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Castries vs Phoenix
Comparing Castries change · Phoenix change
Castries is the warmer of the two — about 5°F on the annual average; Castries is the wetter, with 70 in 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 5°F on the annual average.
Precipitation
Castries is the wetter — about 70 in 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 (°F) Varies through 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 |
| Phoenix | 68 | 71 | 78 | 86 | 95 | 104 | 107 | 105 | 100 | 89 | 77 | 66 |
| Difference | -13 | -9 | -2 | +4 | +12 | +21 | +23 | +21 | +16 | +6 | -6 | -15 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Phoenix | 68 | 71 | 78 | 86 | 95 | 104 |
| Difference | -13 | -9 | -2 | +4 | +12 | +21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Phoenix | 107 | 105 | 100 | 89 | 77 | 66 |
| Difference | +23 | +21 | +16 | +6 | -6 | -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 |
| Phoenix | 46 | 49 | 55 | 61 | 70 | 79 | 85 | 84 | 78 | 66 | 54 | 45 |
| Difference | -32 | -28 | -23 | -18 | -11 | -2 | +3 | +2 | -4 | -16 | -27 | -34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Phoenix | 46 | 49 | 55 | 61 | 70 | 79 |
| Difference | -32 | -28 | -23 | -18 | -11 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Phoenix | 85 | 84 | 78 | 66 | 54 | 45 |
| Difference | +3 | +2 | -4 | -16 | -27 | -34 |
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 |
| Phoenix | 0.9 | 0.9 | 0.8 | 0.2 | 0.1 | 0 | 0.9 | 0.9 | 0.6 | 0.6 | 0.6 | 0.7 |
| Difference | -3.6 | -2.1 | -1.8 | -3.3 | -4.4 | -5.2 | -7.6 | -10.5 | -8.3 | -9.1 | -9 | -5.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Phoenix | 0.9 | 0.9 | 0.8 | 0.2 | 0.1 | 0 |
| Difference | -3.6 | -2.1 | -1.8 | -3.3 | -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 |
| Phoenix | 0.9 | 0.9 | 0.6 | 0.6 | 0.6 | 0.7 |
| Difference | -7.6 | -10.5 | -8.3 | -9.1 | -9 | -5.1 |
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