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Sendai vs Castries
Comparing Sendai change · Castries change
Castries is the warmer of the two — about 14°C on the annual average; Castries is the wetter, with 685 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Sendai and Castries, in everyday terms.
Summers
Summers are nearly the same
Sendai: Warm
Castries: Warm
Winters
Castries has far milder winters
Sendai: Cold
Castries: Stays warm
Rain & snow
Castries is wetter
Sendai: Wet
Castries: Very wet
Sky
Castries is far sunnier
Sendai: Often grey
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 14°C on the annual average.
Precipitation
Castries is the wetter — about 685 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 6 | 7 | 10 | 16 | 20 | 23 | 27 | 28 | 25 | 20 | 14 | 8 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +21 | +20 | +17 | +12 | +8 | +5 | +2 | +1 | +4 | +9 | +14 | +19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 6 | 7 | 10 | 16 | 20 | 23 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +21 | +20 | +17 | +12 | +8 | +5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 27 | 28 | 25 | 20 | 14 | 8 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +2 | +1 | +4 | +9 | +14 | +19 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | -1 | -1 | 1 | 6 | 12 | 16 | 20 | 22 | 18 | 12 | 6 | 1 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +27 | +26 | +24 | +20 | +15 | +11 | +7 | +6 | +10 | +16 | +21 | +25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | -1 | -1 | 1 | 6 | 12 | 16 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +27 | +26 | +24 | +20 | +15 | +11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 20 | 22 | 18 | 12 | 6 | 1 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +7 | +6 | +10 | +16 | +21 | +25 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 42 | 34 | 74 | 90 | 110 | 144 | 178 | 158 | 193 | 151 | 59 | 44 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +71 | +42 | -8 | -1 | +4 | -10 | +38 | +134 | +31 | +96 | +184 | +105 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 42 | 34 | 74 | 90 | 110 | 144 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +71 | +42 | -8 | -1 | +4 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 178 | 158 | 193 | 151 | 59 | 44 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +38 | +134 | +31 | +96 | +184 | +105 |
Cloud cover (%) Sendai runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 77 | 75 | 73 | 71 | 71 | 77 | 80 | 71 | 76 | 72 | 74 | 79 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -39 | -37 | -31 | -22 | -18 | -18 | -30 | -25 | -25 | -21 | -28 | -38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 77 | 75 | 73 | 71 | 71 | 77 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -39 | -37 | -31 | -22 | -18 | -18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 80 | 71 | 76 | 72 | 74 | 79 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -30 | -25 | -25 | -21 | -28 | -38 |
Relative humidity (%) Sendai runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sendai | 95 | 93 | 87 | 82 | 81 | 83 | 86 | 85 | 87 | 87 | 89 | 93 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -19 | -19 | -12 | -6 | -4 | -5 | -7 | -6 | -8 | -8 | -10 | -16 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Sendai | 95 | 93 | 87 | 82 | 81 | 83 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -19 | -19 | -12 | -6 | -4 | -5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Sendai | 86 | 85 | 87 | 87 | 89 | 93 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -7 | -6 | -8 | -8 | -10 | -16 |
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. Sendai trends → · Castries trends →
Methodology & sources
Sendai
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sendai, about 3 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 Sendai · change Castries → · Sendai page · Castries page