August in Retiro averages a daily high of 32.3°C with nights around 19.5°C. Rain is rare — about 2.1 wet days and 10.9mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Retiro is May–June.
Based on MADRID RETIRO, SP (0.5km), 1995–2024. 30 years of August data.