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Brussels vs Castries
Comparing Brussels change · Castries change
Castries is the warmer of the two — about 29°F on the annual average; Castries is the wetter, with 46 in 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 29°F on the annual average.
Precipitation
Castries is the wetter — about 46 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 43 | 45 | 52 | 59 | 65 | 70 | 74 | 74 | 67 | 59 | 49 | 43 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +37 | +35 | +28 | +23 | +17 | +13 | +9 | +10 | +17 | +25 | +33 | +38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 43 | 45 | 52 | 59 | 65 | 70 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +37 | +35 | +28 | +23 | +17 | +13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 74 | 74 | 67 | 59 | 49 | 43 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +9 | +10 | +17 | +25 | +33 | +38 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 34 | 35 | 38 | 42 | 49 | 54 | 58 | 57 | 52 | 47 | 40 | 35 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +44 | +43 | +39 | +36 | +31 | +27 | +24 | +25 | +30 | +35 | +41 | +44 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 34 | 35 | 38 | 42 | 49 | 54 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +44 | +43 | +39 | +36 | +31 | +27 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 58 | 57 | 52 | 47 | 40 | 35 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +24 | +25 | +30 | +35 | +41 | +44 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brussels | 2.8 | 2.2 | 2.2 | 1.7 | 2.4 | 3.1 | 2.8 | 3.2 | 2.5 | 2.6 | 2.6 | 3.5 |
| 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 | +1.7 | +0.8 | +0.4 | +1.8 | +2.1 | +2.2 | +5.7 | +8.2 | +6.4 | +7.1 | +6.9 | +2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Brussels | 2.8 | 2.2 | 2.2 | 1.7 | 2.4 | 3.1 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +1.7 | +0.8 | +0.4 | +1.8 | +2.1 | +2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Brussels | 2.8 | 3.2 | 2.5 | 2.6 | 2.6 | 3.5 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +5.7 | +8.2 | +6.4 | +7.1 | +6.9 | +2.4 |
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