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Hiroshima vs Castries
Comparing Hiroshima change · Castries change
Castries is the warmer of the two — about 11°C on the annual average; Castries is the wetter, with 390 mm 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 11°C on the annual average.
Precipitation
Castries is the wetter — about 390 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 10 | 11 | 15 | 20 | 24 | 27 | 31 | 33 | 29 | 24 | 18 | 12 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +17 | +16 | +12 | +8 | +4 | +1 | -2 | -4 | — | +5 | +10 | +15 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 10 | 11 | 15 | 20 | 24 | 27 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +17 | +16 | +12 | +8 | +4 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 31 | 33 | 29 | 24 | 18 | 12 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | -2 | -4 | — | +5 | +10 | +15 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 2 | 2 | 5 | 10 | 15 | 20 | 24 | 25 | 21 | 15 | 9 | 4 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +24 | +23 | +20 | +16 | +12 | +7 | +3 | +3 | +7 | +13 | +18 | +22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 2 | 2 | 5 | 10 | 15 | 20 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +24 | +23 | +20 | +16 | +12 | +7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 24 | 25 | 21 | 15 | 9 | 4 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +3 | +3 | +7 | +13 | +18 | +22 |
Precipitation (mm) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hiroshima | 46 | 64 | 118 | 141 | 170 | 226 | 280 | 131 | 163 | 109 | 69 | 54 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +67 | +12 | -52 | -51 | -56 | -93 | -64 | +160 | +61 | +137 | +173 | +95 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Hiroshima | 46 | 64 | 118 | 141 | 170 | 226 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +67 | +12 | -52 | -51 | -56 | -93 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Hiroshima | 280 | 131 | 163 | 109 | 69 | 54 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | -64 | +160 | +61 | +137 | +173 | +95 |
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