September in Ponce averages a daily high of 33°C with nights around 22.6°C. Expect roughly 12.3 wet days totalling 175.7mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Ponce is December–April.
Based on PONCE 4 E, PR US (10.6km), 1995–2024. 20 years of September data.