December in Caguas averages a daily high of 29.3°C with nights around 20.6°C. Expect roughly 16.2 wet days totalling 131mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Caguas is December–April.
Based on TRUJILLO ALTO 2 SSW, PR US (11km), 1995–2024. 26 years of December data.