weather in pr april
Key weather averages for Puerto Rico in April. 1  29. 29Â°C max day temperature. 2  9. 9 hours of sunshine per day. 3  14. 14 days with some rainfall. 4  21. 21Â°C min night temperature. 5  13. 13 hours of daylight per day. 6  H. High heat & humidity. 7  121. 121 mm of monthly rainfall. 8  11. 11+ (Extreme) UV index. 9  26. 26Â°C sea temperature.