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Brussels vs Castries
Comparing Brussels change · Castries change
Castries is the warmer of the two — about 16°C on the annual average; Castries is the wetter, with 1157 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Brussels and Castries, in everyday terms.
Summers
Castries has much hotter summers
Brussels: Mild
Castries: Warm
Winters
Castries has far milder winters
Brussels: Chilly
Castries: Stays warm
Rain & snow
Castries is much wetter
Brussels: Moderate rainfall
Castries: Very wet
Sky
Castries is far sunnier
Brussels: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 16°C on the annual average.
Precipitation
Castries is the wetter — about 1157 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 6 | 7 | 11 | 15 | 19 | 21 | 23 | 23 | 20 | 15 | 10 | 6 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +21 | +19 | +16 | +13 | +10 | +7 | +5 | +6 | +9 | +14 | +18 | +21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 6 | 7 | 11 | 15 | 19 | 21 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +21 | +19 | +16 | +13 | +10 | +7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 23 | 23 | 20 | 15 | 10 | 6 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +5 | +6 | +9 | +14 | +18 | +21 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 1 | 1 | 3 | 6 | 9 | 12 | 14 | 14 | 11 | 8 | 4 | 2 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +24 | +24 | +22 | +20 | +17 | +15 | +13 | +14 | +17 | +19 | +23 | +25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 1 | 1 | 3 | 6 | 9 | 12 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +24 | +24 | +22 | +20 | +17 | +15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 14 | 14 | 11 | 8 | 4 | 2 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +13 | +14 | +17 | +19 | +23 | +25 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 70 | 56 | 56 | 44 | 61 | 79 | 72 | 82 | 62 | 67 | 66 | 89 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +43 | +19 | +10 | +46 | +53 | +55 | +144 | +209 | +162 | +179 | +176 | +60 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 70 | 56 | 56 | 44 | 61 | 79 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +43 | +19 | +10 | +46 | +53 | +55 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 72 | 82 | 62 | 67 | 66 | 89 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +144 | +209 | +162 | +179 | +176 | +60 |
Cloud cover (%) Brussels runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 73 | 72 | 71 | 68 | 70 | 71 | 68 | 67 | 66 | 71 | 75 | 74 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -35 | -34 | -29 | -19 | -18 | -12 | -18 | -21 | -15 | -20 | -29 | -34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 73 | 72 | 71 | 68 | 70 | 71 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -35 | -34 | -29 | -19 | -18 | -12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 68 | 67 | 66 | 71 | 75 | 74 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -18 | -21 | -15 | -20 | -29 | -34 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 92 | 89 | 84 | 79 | 77 | 76 | 75 | 76 | 80 | 85 | 91 | 93 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -17 | -15 | -10 | -3 | +1 | +2 | +3 | +3 | -1 | -6 | -12 | -17 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 92 | 89 | 84 | 79 | 77 | 76 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -17 | -15 | -10 | -3 | +1 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 75 | 76 | 80 | 85 | 91 | 93 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +3 | +3 | -1 | -6 | -12 | -17 |
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. Brussels trends → · Castries trends →
Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).
Methodology & sources
Brussels
Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Uccle, a weather station, about 6 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 Brussels · change Castries → · Brussels page · Castries page