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Hiroshima vs Castries
Comparing Hiroshima change · Castries change
Castries is the warmer of the two — about 19°F on the annual average; Castries is the wetter, with 15 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Hiroshima and Castries, in everyday terms.
Summers
Hiroshima has much hotter summers
Hiroshima: Hot
Castries: Warm
Winters
Castries has far milder winters
Hiroshima: Chilly
Castries: Stays warm
Rain & snow
Castries is wetter
Hiroshima: Very wet
Castries: Very wet
Sky
Castries is far sunnier
Hiroshima: Often grey
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 19°F on the annual average.
Precipitation
Castries is the wetter — about 15 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 50 | 52 | 58 | 68 | 76 | 81 | 88 | 91 | 84 | 75 | 64 | 54 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +30 | +28 | +22 | +14 | +7 | +2 | -4 | -7 | — | +9 | +19 | +27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 50 | 52 | 58 | 68 | 76 | 81 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +30 | +28 | +22 | +14 | +7 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 88 | 91 | 84 | 75 | 64 | 54 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | -4 | -7 | — | +9 | +19 | +27 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 36 | 36 | 41 | 50 | 59 | 68 | 75 | 77 | 70 | 59 | 48 | 39 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +42 | +41 | +36 | +29 | +21 | +13 | +6 | +5 | +12 | +23 | +33 | +40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 36 | 36 | 41 | 50 | 59 | 68 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +42 | +41 | +36 | +29 | +21 | +13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 75 | 77 | 70 | 59 | 48 | 39 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +6 | +5 | +12 | +23 | +33 | +40 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 1.8 | 2.5 | 4.7 | 5.6 | 6.7 | 8.9 | 11 | 5.2 | 6.4 | 4.3 | 2.7 | 2.1 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +2.6 | +0.5 | -2 | -2 | -2.2 | -3.7 | -2.5 | +6.3 | +2.4 | +5.4 | +6.8 | +3.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 1.8 | 2.5 | 4.7 | 5.6 | 6.7 | 8.9 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +2.6 | +0.5 | -2 | -2 | -2.2 | -3.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 11 | 5.2 | 6.4 | 4.3 | 2.7 | 2.1 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | -2.5 | +6.3 | +2.4 | +5.4 | +6.8 | +3.8 |
Cloud cover (%) Hiroshima runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 81 | 79 | 73 | 68 | 68 | 79 | 75 | 67 | 72 | 68 | 72 | 78 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -43 | -40 | -31 | -19 | -15 | -21 | -25 | -21 | -21 | -17 | -26 | -37 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 81 | 79 | 73 | 68 | 68 | 79 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -43 | -40 | -31 | -19 | -15 | -21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 75 | 67 | 72 | 68 | 72 | 78 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -25 | -21 | -21 | -17 | -26 | -37 |
Relative humidity (%) Hiroshima runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 84 | 82 | 80 | 79 | 79 | 83 | 85 | 83 | 83 | 83 | 83 | 85 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -9 | -8 | -5 | -3 | -1 | -4 | -7 | -4 | -4 | -3 | -4 | -8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 84 | 82 | 80 | 79 | 79 | 83 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -9 | -8 | -5 | -3 | -1 | -4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 85 | 83 | 83 | 83 | 83 | 85 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -7 | -4 | -4 | -3 | -4 | -8 |
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. Hiroshima trends → · Castries trends →
Methodology & sources
Hiroshima
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Hiroshima, about 1 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.
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.
← change Hiroshima · change Castries → · Hiroshima page · Castries page