October in Petroúpolis averages a daily high of 23.9°C with nights around 16°C. Expect roughly 4 wet days totalling 35.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Petroúpolis is April–May.
Based on HELLINIKON, GR (16.8km), 1995–2024. 22 years of October data.