Temperature, rainfall, prevailing weather conditions, when to go Map from Google - Amsterdam In Amsterdam, capital of the Netherlands, the climate is sub-oceanic, humid and rainy, influenced by the North Sea but also by the Atlantic Ocean, which is not far, so it has cold (but not freezing) winters, and quite cool summers. The average temperature in January and February is 3.5 °C (38.5 °F), while in July and August it's 17 °C (62.5 °F).