Amsterdam or Brussels: which climate?
Amsterdam (The Netherlands) has a temperate oceanic climate, whereas Brussels (Belgium) has a temperate oceanic climate, according to the Köppen-Geiger classification.
The values compared here are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme. The same method and the same period apply to Amsterdam and to Brussels.
Amsterdam and Brussels have the same mean annual temperature, about 9.9 °C: the gap between the two cities is too small to be told apart from the noise in the data.
Amsterdam and Brussels receive comparable annual rainfall, on the order of 751 mm.
Amsterdam and Brussels are warming at the same rate: about +1.9 °C between 1940 and 2025 on both sides.
Amsterdam averages 2 hot days (≥ 30 °C) and 43 frost days per year; Brussels averages 3 and 47.
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
| Indicator | Amsterdam | Brussels | Difference |
|---|---|---|---|
| Mean daily temperature | 9.9 °C | 10.2 °C | negligible |
| Average daily high | 13.0 °C | 13.6 °C | +0.6 °C |
| Average daily low | 6.9 °C | 6.9 °C | negligible |
| Annual rainfall | 751 mm | 735 mm | negligible |
| Sunshine / day | 7.8 h | 7.6 h | negligible |
| Hot days (≥ 30 °C) | 2 d/yr | 3 d/yr | negligible |
| Frost days (< 0 °C) | 43 d/yr | 47 d/yr | negligible |
| Rainy days (≥ 1 mm) | 147 d/yr | 144 d/yr | negligible |
| Mean relative humidity | 82 % | 80 % | negligible |
| Average peak wind | 21.3 km/h | 19.9 km/h | negligible |
A difference is only reported when it exceeds the resolution of the data. ERA5 is a reanalysis on a grid of about 31 km: two nearby cities often fall in the same cell, and below half a degree you are reading the grid, not the climate.