🇳🇱Netherlands

The Netherlands occupies 41,865 km² at 50°45′–53°33′N along northwestern Europe's North Sea coast, encompassing twelve provinces from Zealand and Limburg in the south to Groningen and Friesland in the north. Predominantly flat with approximately 26% of the country below sea level — including the densely populated Randstad megalopolis (Amsterdam, Rotterdam, The Hague, Utrecht) — the landscape features polders reclaimed from sea and lakes, coastal dunes, river deltas (Rhine, Meuse, Scheldt), and the highest point Vaalserberg at merely 322 m in Limburg.

This low-lying deltaic terrain creates acute vulnerability to North Sea storm surges and river flooding, protected by the extensive Delta Works system constructed after the severe 1953 North Sea flood (1,835 deaths). The climate is maritime temperate (Cfb) — mild, humid, with moderate seasonal variation heavily moderated by North Sea influence and prevailing westerly winds, though continental influences occasionally penetrate from the east.

De Bilt (central Netherlands) averages 3°C in January and 18°C in July with approximately 850 mm annual rainfall. Maastricht (Limburg) records 3°C January and 19°C July with 800 mm. Vlissingen (Zeeland coast) shows maritime moderation with 4°C January and 17°C July with 800 mm. The Netherlands has warmed approximately 2.0°C above the 1901–1930 baseline since 1970, among Europe's fastest rates.

On 25 July 2019, Gilze-Rijen Air Base reached 40.7°C, a national record. Other significant events include the August 2003 European heatwave (approximately 1,500 excess deaths), the July 2021 Meuse floods in Limburg (43 deaths, extensive damage in Valkenburg, Venlo, and Roermond after 100–150 mm rainfall in 24–48 hours), the 2018 summer drought (agricultural losses over €450 million), and the 2022 drought (driest summer since 1976). Rising sea level (approximately 2.8 mm/year) poses risks to low-lying areas.

Our archive covers 0 Dutch cities with daily ERA5 reanalysis data going back to 1940.7°C at Gilze-Rijen, the 1953 North Sea flood (the benchmark for Delta Works), and accelerating sea-level rise threatening the Randstad.