Rijswijk's climate is characterized by mild winters, with temperatures rarely dropping below freezing and often rising above 10°C in January. Spring arrives in March, bringing warmer temperatures that steadily increase throughout the season, peaking in May at an average of 10°C. Summer months are cool and pleasant, with highs around 20-23°C in June and July, while autumn sees a slight cooling trend, with temperatures dropping to around 14°C by October. Winters are still relatively mild, with December averages hovering around 8°C. The overall temperature range is moderate, with few extreme variations throughout the year.