April in Arecibo averages a daily high of 28.6°C with nights around 17.5°C. Expect roughly 13.5 wet days totalling 194.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Arecibo is December–March.
Based on ARECIBO OBSERVATORY, PR US (14.2km), 1995–2024. 27 years of April data.