Home › Compare › Castries vs Washington
Castries vs Washington
Comparing Castries change · Washington change
Castries is the warmer of the two — about 13°C on the annual average; Castries is the wetter, with 773 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Washington, in everyday terms.
Summers
Washington has hotter summers
Castries: Warm
Washington: Hot
Winters
Castries has far milder winters
Castries: Stays warm
Washington: Cold
Rain & snow
Castries is wetter
Castries: Very wet
Washington: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Washington: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 13°C on the annual average.
Precipitation
Castries is the wetter — about 773 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 |
| Washington | 7 | 9 | 13 | 20 | 24 | 29 | 31 | 30 | 27 | 20 | 14 | 9 |
| Difference | -20 | -18 | -14 | -8 | -4 | +1 | +3 | +2 | -2 | -8 | -14 | -19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Washington | 7 | 9 | 13 | 20 | 24 | 29 |
| Difference | -20 | -18 | -14 | -8 | -4 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Washington | 31 | 30 | 27 | 20 | 14 | 9 |
| Difference | +3 | +2 | -2 | -8 | -14 | -19 |
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 |
| Washington | -3 | -2 | 2 | 7 | 13 | 18 | 20 | 20 | 16 | 9 | 4 | -0 |
| Difference | -28 | -27 | -24 | -19 | -14 | -9 | -7 | -8 | -12 | -19 | -23 | -27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Washington | -3 | -2 | 2 | 7 | 13 | 18 |
| Difference | -28 | -27 | -24 | -19 | -14 | -9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Washington | 20 | 20 | 16 | 9 | 4 | -0 |
| Difference | -7 | -8 | -12 | -19 | -23 | -27 |
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 |
| Washington | 78 | 73 | 103 | 86 | 113 | 123 | 126 | 106 | 111 | 95 | 80 | 95 |
| Difference | -35 | -2 | +36 | -4 | -1 | -10 | -90 | -186 | -113 | -151 | -163 | -54 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Washington | 78 | 73 | 103 | 86 | 113 | 123 |
| Difference | -35 | -2 | +36 | -4 | -1 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Washington | 126 | 106 | 111 | 95 | 80 | 95 |
| Difference | -90 | -186 | -113 | -151 | -163 | -54 |
Cloud cover (%) Washington 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 |
| Washington | 62 | 62 | 61 | 60 | 60 | 57 | 54 | 53 | 53 | 51 | 56 | 61 |
| Difference | +23 | +23 | +19 | +11 | +8 | -2 | +5 | +7 | +2 | — | +10 | +20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Washington | 62 | 62 | 61 | 60 | 60 | 57 |
| Difference | +23 | +23 | +19 | +11 | +8 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Washington | 54 | 53 | 53 | 51 | 56 | 61 |
| Difference | +5 | +7 | +2 | — | +10 | +20 |
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 |
| Washington | 83 | 81 | 79 | 77 | 77 | 74 | 68 | 69 | 71 | 75 | 78 | 83 |
| Difference | +7 | +7 | +4 | +1 | — | -5 | -11 | -10 | -8 | -4 | -1 | +6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Washington | 83 | 81 | 79 | 77 | 77 | 74 |
| Difference | +7 | +7 | +4 | +1 | — | -5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Washington | 68 | 69 | 71 | 75 | 78 | 83 |
| Difference | -11 | -10 | -8 | -4 | -1 | +6 |
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 → · Washington 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.
Washington
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Oxon Hill (NOAA GHCN station USC00186800), about 12 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 Washington → · Castries page · Washington page