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Castries vs Tucson
Comparing Castries change · Tucson change
Castries is the warmer of the two — about 10°F on the annual average; Castries is the wetter, with 66 in 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 10°F on the annual average.
Precipitation
Castries is the wetter — about 66 in 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 (°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 |
| Tucson | 66 | 69 | 76 | 83 | 91 | 101 | 100 | 98 | 95 | 86 | 75 | 65 |
| Difference | -14 | -11 | -5 | +1 | +8 | +17 | +16 | +14 | +11 | +2 | -8 | -16 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Tucson | 66 | 69 | 76 | 83 | 91 | 101 |
| Difference | -14 | -11 | -5 | +1 | +8 | +17 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Tucson | 100 | 98 | 95 | 86 | 75 | 65 |
| Difference | +16 | +14 | +11 | +2 | -8 | -16 |
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 |
| Tucson | 42 | 45 | 50 | 56 | 64 | 73 | 77 | 76 | 72 | 60 | 50 | 42 |
| Difference | -36 | -33 | -28 | -23 | -16 | -8 | -4 | -6 | -10 | -21 | -31 | -38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Tucson | 42 | 45 | 50 | 56 | 64 | 73 |
| Difference | -36 | -33 | -28 | -23 | -16 | -8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Tucson | 77 | 76 | 72 | 60 | 50 | 42 |
| Difference | -4 | -6 | -10 | -21 | -31 | -38 |
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 |
| Tucson | 0.9 | 0.8 | 0.6 | 0.3 | 0.2 | 0.3 | 2.1 | 2.6 | 1.7 | 0.6 | 0.6 | 0.9 |
| Difference | -3.6 | -2.1 | -2.1 | -3.2 | -4.3 | -5 | -6.5 | -8.8 | -7.1 | -9.1 | -8.9 | -5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Tucson | 0.9 | 0.8 | 0.6 | 0.3 | 0.2 | 0.3 |
| Difference | -3.6 | -2.1 | -2.1 | -3.2 | -4.3 | -5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Tucson | 2.1 | 2.6 | 1.7 | 0.6 | 0.6 | 0.9 |
| Difference | -6.5 | -8.8 | -7.1 | -9.1 | -8.9 | -5 |
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