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Castries vs Nantucket
Comparing Castries change · Nantucket change
Castries is the warmer of the two — about 17°C on the annual average; Castries is the wetter, with 802 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Nantucket, in everyday terms.
Summers
Castries has hotter summers
Castries: Warm
Nantucket: Warm
Winters
Castries has far milder winters
Castries: Stays warm
Nantucket: Cold
Rain & snow
Castries is wetter
Castries: Very wet
Nantucket: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Nantucket: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 17°C on the annual average.
Precipitation
Castries is the wetter — about 802 mm more across the year.
Clear skies
Castries 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) Castries runs higher most of 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 |
| Nantucket | 4 | 4 | 7 | 12 | 17 | 22 | 26 | 25 | 22 | 16 | 11 | 7 |
| Difference | -23 | -22 | -20 | -16 | -11 | -6 | -3 | -4 | -7 | -12 | -17 | -21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Nantucket | 4 | 4 | 7 | 12 | 17 | 22 |
| Difference | -23 | -22 | -20 | -16 | -11 | -6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Nantucket | 26 | 25 | 22 | 16 | 11 | 7 |
| Difference | -3 | -4 | -7 | -12 | -17 | -21 |
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 |
| Nantucket | -5 | -5 | -1 | 4 | 9 | 14 | 18 | 17 | 14 | 8 | 3 | -2 |
| Difference | -31 | -30 | -27 | -23 | -18 | -13 | -9 | -10 | -14 | -20 | -24 | -28 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Nantucket | -5 | -5 | -1 | 4 | 9 | 14 |
| Difference | -31 | -30 | -27 | -23 | -18 | -13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Nantucket | 18 | 17 | 14 | 8 | 3 | -2 |
| Difference | -9 | -10 | -14 | -20 | -24 | -28 |
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 |
| Nantucket | 94 | 90 | 121 | 102 | 87 | 85 | 70 | 82 | 97 | 109 | 103 | 119 |
| Difference | -19 | +15 | +55 | +12 | -27 | -49 | -146 | -209 | -127 | -137 | -139 | -30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Nantucket | 94 | 90 | 121 | 102 | 87 | 85 |
| Difference | -19 | +15 | +55 | +12 | -27 | -49 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Nantucket | 70 | 82 | 97 | 109 | 103 | 119 |
| Difference | -146 | -209 | -127 | -137 | -139 | -30 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Nantucket | 24 | 16 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Nantucket | 24 | 16 | 9 | 0 | 0 | 0 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Nantucket | 0 | 0 | 0 | 0 | 0 | 5 |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Nantucket 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 |
| Nantucket | 69 | 66 | 63 | 62 | 63 | 61 | 56 | 53 | 53 | 57 | 63 | 67 |
| Difference | +30 | +27 | +22 | +13 | +11 | +2 | +7 | +6 | +2 | +5 | +17 | +26 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Nantucket | 69 | 66 | 63 | 62 | 63 | 61 |
| Difference | +30 | +27 | +22 | +13 | +11 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Nantucket | 56 | 53 | 53 | 57 | 63 | 67 |
| Difference | +7 | +6 | +2 | +5 | +17 | +26 |
Relative humidity (%) Nantucket 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 |
| Nantucket | 81 | 80 | 81 | 85 | 89 | 89 | 89 | 87 | 83 | 80 | 79 | 80 |
| Difference | +5 | +6 | +7 | +9 | +11 | +11 | +10 | +8 | +5 | +1 | — | +3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Nantucket | 81 | 80 | 81 | 85 | 89 | 89 |
| Difference | +5 | +6 | +7 | +9 | +11 | +11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Nantucket | 89 | 87 | 83 | 80 | 79 | 80 |
| Difference | +10 | +8 | +5 | +1 | — | +3 |
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 → · Nantucket trends →
Nantucket from Cfb to Cfa.
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.
Nantucket
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Hyannis (NOAA GHCN station USC00193821), about 46 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 Nantucket → · Castries page · Nantucket page