September in Leiria averages a daily high of 26.6°C with nights around 14.1°C. Expect roughly 10 wet days totalling 80.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Leiria is June–July.
Based on COIMBRA CERNACHE, PO (53.7km), 1995–2024. 21 years of September data.