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Castries vs Tucson
Comparing Castries change · Tucson change
Castries is the warmer of the two — about 5°C on the annual average; Castries is the wetter, with 1668 mm more rain a year, and Tucson the sunnier.
How the seasons compare
The differences between Castries and Tucson, in everyday terms.
Summers
Tucson has far hotter summers
Castries: Warm
Tucson: Very hot
Winters
Castries has far milder winters
Castries: Stays warm
Tucson: Cool
Rain & snow
Castries is much wetter
Castries: Very wet
Tucson: Fairly dry
Sky
Tucson is sunnier
Castries: Fairly sunny
Tucson: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 5°C on the annual average.
Precipitation
Castries is the wetter — about 1668 mm more across the year.
Clear skies
Tucson 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 |
| Tucson | 19 | 21 | 24 | 28 | 33 | 38 | 38 | 37 | 35 | 30 | 24 | 18 |
| Difference | -8 | -6 | -3 | +1 | +5 | +10 | +9 | +8 | +6 | +1 | -4 | -9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Tucson | 19 | 21 | 24 | 28 | 33 | 38 |
| Difference | -8 | -6 | -3 | +1 | +5 | +10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Tucson | 38 | 37 | 35 | 30 | 24 | 18 |
| Difference | +9 | +8 | +6 | +1 | -4 | -9 |
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 |
| Tucson | 6 | 7 | 10 | 13 | 18 | 23 | 25 | 25 | 22 | 16 | 10 | 5 |
| Difference | -20 | -18 | -15 | -13 | -9 | -4 | -2 | -3 | -6 | -12 | -17 | -21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Tucson | 6 | 7 | 10 | 13 | 18 | 23 |
| Difference | -20 | -18 | -15 | -13 | -9 | -4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Tucson | 25 | 25 | 22 | 16 | 10 | 5 |
| Difference | -2 | -3 | -6 | -12 | -17 | -21 |
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 |
| Tucson | 22 | 21 | 14 | 8 | 4 | 7 | 52 | 67 | 43 | 15 | 16 | 23 |
| Difference | -91 | -54 | -52 | -81 | -109 | -126 | -164 | -225 | -181 | -232 | -227 | -126 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Tucson | 22 | 21 | 14 | 8 | 4 | 7 |
| Difference | -91 | -54 | -52 | -81 | -109 | -126 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Tucson | 52 | 67 | 43 | 15 | 16 | 23 |
| Difference | -164 | -225 | -181 | -232 | -227 | -126 |
Cloud cover (%) Varies through 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 |
| Tucson | 39 | 43 | 37 | 27 | 25 | 23 | 55 | 52 | 33 | 26 | 31 | 38 |
| Difference | — | +4 | -5 | -22 | -28 | -35 | +5 | +6 | -18 | -26 | -15 | -2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Tucson | 39 | 43 | 37 | 27 | 25 | 23 |
| Difference | — | +4 | -5 | -22 | -28 | -35 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Tucson | 55 | 52 | 33 | 26 | 31 | 38 |
| Difference | +5 | +6 | -18 | -26 | -15 | -2 |
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 |
| Tucson | 48 | 46 | 39 | 30 | 24 | 20 | 41 | 47 | 43 | 38 | 39 | 47 |
| Difference | -28 | -29 | -36 | -46 | -54 | -59 | -38 | -32 | -35 | -42 | -40 | -29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Tucson | 48 | 46 | 39 | 30 | 24 | 20 |
| Difference | -28 | -29 | -36 | -46 | -54 | -59 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Tucson | 41 | 47 | 43 | 38 | 39 | 47 |
| Difference | -38 | -32 | -35 | -42 | -40 | -29 |
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 → · Tucson trends →
Tucson from BSh to BWh.
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.
Tucson
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Tucson Wfo (NOAA GHCN station USC00028815), about 3 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 Tucson → · Castries page · Tucson page