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Castries vs Washington
Comparing Castries change · Washington change
Castries is the warmer of the two — about 24°F on the annual average; Castries is the wetter, with 30 in 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 24°F on the annual average.
Precipitation
Castries is the wetter — about 30 in 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 (°F) Castries runs higher most of 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 |
| Washington | 44 | 48 | 56 | 67 | 76 | 84 | 88 | 87 | 80 | 68 | 57 | 48 |
| Difference | -36 | -32 | -25 | -14 | -7 | +1 | +5 | +3 | -4 | -15 | -25 | -33 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Washington | 44 | 48 | 56 | 67 | 76 | 84 |
| Difference | -36 | -32 | -25 | -14 | -7 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Washington | 88 | 87 | 80 | 68 | 57 | 48 |
| Difference | +5 | +3 | -4 | -15 | -25 | -33 |
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 |
| Washington | 27 | 28 | 35 | 45 | 55 | 64 | 69 | 67 | 61 | 48 | 39 | 31 |
| Difference | -51 | -49 | -43 | -34 | -26 | -17 | -12 | -14 | -22 | -33 | -42 | -48 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Washington | 27 | 28 | 35 | 45 | 55 | 64 |
| Difference | -51 | -49 | -43 | -34 | -26 | -17 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Washington | 69 | 67 | 61 | 48 | 39 | 31 |
| Difference | -12 | -14 | -22 | -33 | -42 | -48 |
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 |
| Washington | 3.1 | 2.9 | 4 | 3.4 | 4.5 | 4.9 | 5 | 4.2 | 4.4 | 3.8 | 3.1 | 3.8 |
| Difference | -1.4 | -0.1 | +1.4 | -0.2 | — | -0.4 | -3.6 | -7.3 | -4.5 | -6 | -6.4 | -2.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Washington | 3.1 | 2.9 | 4 | 3.4 | 4.5 | 4.9 |
| Difference | -1.4 | -0.1 | +1.4 | -0.2 | — | -0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Washington | 5 | 4.2 | 4.4 | 3.8 | 3.1 | 3.8 |
| Difference | -3.6 | -7.3 | -4.5 | -6 | -6.4 | -2.1 |
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