March in Retiro averages a daily high of 16.1°C with nights around 6.4°C. Expect roughly 7.3 wet days totalling 38.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Retiro is May–June.
Based on MADRID RETIRO, SP (0.5km), 1995–2024. 30 years of March data.