Home › Compare › Castries vs Charleston
Castries vs Charleston
Comparing Castries change · Charleston change
Castries is the warmer of the two — about 8°C on the annual average; Castries is the wetter, with 838 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Charleston, in everyday terms.
Summers
Charleston has hotter summers
Castries: Warm
Charleston: Hot
Winters
Castries has far milder winters
Castries: Stays warm
Charleston: Cool
Rain & snow
Castries is wetter
Castries: Very wet
Charleston: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Charleston: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 8°C on the annual average.
Precipitation
Castries is the wetter — about 838 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 |
| Charleston | 14 | 16 | 19 | 22 | 26 | 29 | 31 | 30 | 28 | 24 | 20 | 16 |
| Difference | -12 | -11 | -8 | -5 | -2 | +1 | +2 | +1 | -1 | -4 | -9 | -11 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Charleston | 14 | 16 | 19 | 22 | 26 | 29 |
| Difference | -12 | -11 | -8 | -5 | -2 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Charleston | 31 | 30 | 28 | 24 | 20 | 16 |
| Difference | +2 | +1 | -1 | -4 | -9 | -11 |
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 |
| Charleston | 6 | 8 | 11 | 15 | 20 | 23 | 25 | 25 | 23 | 17 | 12 | 8 |
| Difference | -19 | -17 | -14 | -11 | -7 | -4 | -2 | -3 | -5 | -10 | -15 | -18 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Charleston | 6 | 8 | 11 | 15 | 20 | 23 |
| Difference | -19 | -17 | -14 | -11 | -7 | -4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Charleston | 25 | 25 | 23 | 17 | 12 | 8 |
| Difference | -2 | -3 | -5 | -10 | -15 | -18 |
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 |
| Charleston | 65 | 65 | 77 | 75 | 66 | 123 | 129 | 155 | 133 | 103 | 58 | 74 |
| Difference | -48 | -11 | +11 | -14 | -48 | -10 | -87 | -136 | -91 | -143 | -184 | -75 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Charleston | 65 | 65 | 77 | 75 | 66 | 123 |
| Difference | -48 | -11 | +11 | -14 | -48 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Charleston | 129 | 155 | 133 | 103 | 58 | 74 |
| Difference | -87 | -136 | -91 | -143 | -184 | -75 |
Cloud cover (%) Charleston 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 |
| Charleston | 68 | 70 | 60 | 49 | 50 | 57 | 57 | 59 | 58 | 51 | 56 | 66 |
| Difference | +30 | +31 | +18 | — | -2 | -2 | +7 | +13 | +7 | -1 | +10 | +26 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Charleston | 68 | 70 | 60 | 49 | 50 | 57 |
| Difference | +30 | +31 | +18 | — | -2 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Charleston | 57 | 59 | 58 | 51 | 56 | 66 |
| Difference | +7 | +13 | +7 | -1 | +10 | +26 |
Relative humidity (%) Varies through 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 |
| Charleston | 81 | 81 | 78 | 75 | 73 | 76 | 77 | 79 | 80 | 79 | 79 | 82 |
| Difference | +6 | +6 | +3 | -1 | -4 | -3 | -2 | — | +1 | -1 | — | +5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Charleston | 81 | 81 | 78 | 75 | 73 | 76 |
| Difference | +6 | +6 | +3 | -1 | -4 | -3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Charleston | 77 | 79 | 80 | 79 | 79 | 82 |
| Difference | -2 | — | +1 | -1 | — | +5 |
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 → · Charleston trends →
Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).
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.
Charleston
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Dwtn Charleston (NOAA GHCN station USW00013782), inside the city.
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 Charleston → · Castries page · Charleston page