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Osaka vs Castries
Comparing Osaka change · Castries change
Castries is the warmer of the two — about 18°F on the annual average; Castries is the wetter, with 25 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Osaka and Castries, in everyday terms.
Summers
Osaka has much hotter summers
Osaka: Hot
Castries: Warm
Winters
Castries has far milder winters
Osaka: Chilly
Castries: Stays warm
Rain & snow
Castries is wetter
Osaka: Wet
Castries: Very wet
Sky
Castries is far sunnier
Osaka: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 18°F on the annual average.
Precipitation
Castries is the wetter — about 25 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osaka | 49 | 51 | 58 | 68 | 77 | 82 | 89 | 93 | 85 | 75 | 64 | 54 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +31 | +29 | +23 | +14 | +6 | +1 | -6 | -9 | -1 | +9 | +18 | +27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Osaka | 49 | 51 | 58 | 68 | 77 | 82 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +31 | +29 | +23 | +14 | +6 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Osaka | 89 | 93 | 85 | 75 | 64 | 54 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | -6 | -9 | -1 | +9 | +18 | +27 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osaka | 37 | 38 | 43 | 52 | 61 | 69 | 76 | 78 | 71 | 61 | 50 | 42 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +41 | +40 | +35 | +27 | +19 | +12 | +5 | +3 | +11 | +21 | +30 | +38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Osaka | 37 | 38 | 43 | 52 | 61 | 69 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +41 | +40 | +35 | +27 | +19 | +12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Osaka | 76 | 78 | 71 | 61 | 50 | 42 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +5 | +3 | +11 | +21 | +30 | +38 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osaka | 1.9 | 2.4 | 4.1 | 4 | 5.4 | 7.3 | 6.9 | 4.4 | 6 | 5.4 | 2.9 | 2.2 |
| 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 | +0.6 | -1.4 | -0.5 | -0.9 | -2 | +1.6 | +7 | +2.8 | +4.3 | +6.7 | +3.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Osaka | 1.9 | 2.4 | 4.1 | 4 | 5.4 | 7.3 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +2.6 | +0.6 | -1.4 | -0.5 | -0.9 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Osaka | 6.9 | 4.4 | 6 | 5.4 | 2.9 | 2.2 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +1.6 | +7 | +2.8 | +4.3 | +6.7 | +3.7 |
Cloud cover (%) Osaka runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osaka | 72 | 69 | 67 | 65 | 69 | 80 | 74 | 63 | 70 | 66 | 66 | 69 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -33 | -31 | -25 | -16 | -17 | -22 | -25 | -17 | -19 | -15 | -20 | -29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Osaka | 72 | 69 | 67 | 65 | 69 | 80 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -33 | -31 | -25 | -16 | -17 | -22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Osaka | 74 | 63 | 70 | 66 | 66 | 69 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -25 | -17 | -19 | -15 | -20 | -29 |
Relative humidity (%) Osaka runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Osaka | 84 | 81 | 80 | 78 | 80 | 83 | 85 | 84 | 84 | 84 | 84 | 84 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -8 | -7 | -5 | -2 | -2 | -5 | -6 | -5 | -6 | -5 | -5 | -7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Osaka | 84 | 81 | 80 | 78 | 80 | 83 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -8 | -7 | -5 | -2 | -2 | -5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Osaka | 85 | 84 | 84 | 84 | 84 | 84 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -6 | -5 | -6 | -5 | -5 | -7 |
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. Osaka trends → · Castries trends →
Methodology & sources
Osaka
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Osaka, about 2 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 Osaka · change Castries → · Osaka page · Castries page