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Tallinn vs Castries
Comparing Tallinn change · Castries change
Castries is the warmer of the two — about 19°C on the annual average; Castries is the wetter, with 1226 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Tallinn and Castries, in everyday terms.
Summers
Castries has much hotter summers
Tallinn: Mild
Castries: Warm
Winters
Castries has far milder winters
Tallinn: Cold
Castries: Stays warm
Rain & snow
Castries is much wetter
Tallinn: Moderate rainfall
Castries: Very wet
Sky
Castries is far sunnier
Tallinn: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 19°C on the annual average.
Precipitation
Castries is the wetter — about 1226 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tallinn | 1 | -1 | 3 | 9 | 15 | 20 | 23 | 21 | 17 | 11 | 5 | 2 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +26 | +28 | +24 | +18 | +13 | +9 | +6 | +7 | +12 | +18 | +23 | +25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Tallinn | 1 | -1 | 3 | 9 | 15 | 20 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +26 | +28 | +24 | +18 | +13 | +9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Tallinn | 23 | 21 | 17 | 11 | 5 | 2 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +6 | +7 | +12 | +18 | +23 | +25 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tallinn | -5 | -3 | -0 | -0 | 9 | 9 | 18 | 18 | 14 | 9 | 0 | -2 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +30 | +28 | +26 | +26 | +18 | +18 | +9 | +10 | +14 | +19 | +27 | +29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Tallinn | -5 | -3 | -0 | -0 | 9 | 9 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +30 | +28 | +26 | +26 | +18 | +18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Tallinn | 18 | 18 | 14 | 9 | 0 | -2 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +9 | +10 | +14 | +19 | +27 | +29 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tallinn | 64 | 66 | 35 | 31 | 36 | 63 | 72 | 86 | 66 | 89 | 67 | 61 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +49 | +10 | +31 | +58 | +77 | +70 | +144 | +206 | +158 | +158 | +175 | +89 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Tallinn | 64 | 66 | 35 | 31 | 36 | 63 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +49 | +10 | +31 | +58 | +77 | +70 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Tallinn | 72 | 86 | 66 | 89 | 67 | 61 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +144 | +206 | +158 | +158 | +175 | +89 |
Cloud cover (%) Tallinn runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tallinn | 81 | 76 | 68 | 65 | 57 | 61 | 59 | 61 | 68 | 77 | 82 | 83 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -43 | -38 | -26 | -15 | -5 | -2 | -10 | -15 | -17 | -26 | -36 | -42 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Tallinn | 81 | 76 | 68 | 65 | 57 | 61 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -43 | -38 | -26 | -15 | -5 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Tallinn | 59 | 61 | 68 | 77 | 82 | 83 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -10 | -15 | -17 | -26 | -36 | -42 |
Relative humidity (%) Tallinn runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tallinn | 92 | 93 | 90 | 86 | 81 | 80 | 79 | 78 | 81 | 86 | 90 | 91 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -16 | -18 | -15 | -9 | -4 | -2 | — | +1 | -3 | -7 | -10 | -14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Tallinn | 92 | 93 | 90 | 86 | 81 | 80 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -16 | -18 | -15 | -9 | -4 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Tallinn | 79 | 78 | 81 | 86 | 90 | 91 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | — | +1 | -3 | -7 | -10 | -14 |
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. Tallinn trends → · Castries trends →
Tallinn is projected to shift from Cfb to Dfb by the 2071–2099 window (SSP2-4.5).
Methodology & sources
Tallinn
Temperature & precipitation — 1991–2020 normals computed from 14 years of daily observations at Tallinn, a weather station, about 11 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.
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 Tallinn · change Castries → · Tallinn page · Castries page