April weather forecast
Puerto Rico, USA

As April unfolds, Puerto Rico witnesses the true transitional nature of this month, marking the latter stages of the dry season while welcoming the initial inklings of the wet season. Temperature-wise, the island sees a subtle rise with lows averaging 74°F (23.3°C) and highs touching 87°F (30.6°C). This temperature shift from March is minimal but signals the approach of the tropical summer months.

The geographical dynamics play out consistently: cities in the north, including San Juan, experience cooler temperatures compared to the southern coastal areas. However, it's the high-altitude towns within the Cordillera Central Mountain Range, such as Aibonito and Adjuntas, that continue to boast more moderate temperatures, offering a refreshing contrast to the island's warmer locales.

Compared to March, April presents a noticeable increase in rainfall frequency. While the month doesn't usher in the peak of the wet season, sporadic showers become more regular, hinting at the imminent months of heightened precipitation. Coastal regions, such as Carolina and Cabo Rojo, while experiencing an uptick in warmth, also begin to see intermittent rain events, indicating the island's gradual shift into its tropical rainforest climate.

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• San Juan - April »
  The month with the least rainfall in San Juan is April, when the rain falls for 12.4 days and typically collects 0.55" (14mm) of precipitation. April through November, with an average maximum UV index of 7, are months with the highest UV index in San Juan, Puerto Rico.
• Fajardo - April »
  In Fajardo during April, the rain falls for 15.2 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Fajardo in April, during 15.2 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.
• Toa Baja - April »
  In Toa Baja in April, during 18.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. As Toa Baja welcomes April, the average high-temperature stabilizes at a still moderately hot 81.1°F (27.3°C), showing little deviation from March's 80.2°F (26.8°C).
• Aguadilla - April »
  In Aguadilla in April, the average water temperature is 80.4°F (26.9°C). An average low-temperature of 75.7°F (24.3°C) is witnessed throughout the month of April in Aguadilla a mere drop from the daytime peak.
• Vega Baja - April »
  February through April, with an average relative humidity of 77%, are the least humid months in Vega Baja, Puerto Rico. In Vega Baja during April, the rain falls for 18.2 days and regularly aggregates up to 1.77" (45mm) of precipitation.
• Juana Díaz - April »
  On the first day of April in Juana Díaz sunrise is at 6:19 am and sunset at 6:39 pm. The months with the lowest UV index in Juana Díaz are January through April, November and December, with an average maximum UV index of 6.
• Adjuntas - April »
  April through October, with an average maximum UV index of 7, are months with the highest UV index in Adjuntas, Puerto Rico. In Adjuntas, in April, it is raining for 19.3 days, with typically 1.34" (34mm) of accumulated precipitation.
• Cabo Rojo - April »
  In Cabo Rojo during April, the rain falls for 19.8 days and regularly aggregates up to 1.69" (43mm) of precipitation. In Cabo Rojo, Puerto Rico, during April, the rain falls for 19.8 days and regularly aggregates up to 1.69" (43mm) of precipitation.
• Guánica - April »
  April in Guánica, Puerto Rico brings a noticeable increase in rain and humidity, subtly hinting at the impending wet season. In April, the average ocean temperature in Guánica is 80.4°F (26.9°C).
• Vega Alta - April »
  In Vega Alta in April, it is raining for 18.3 days, with typically 1.81" (46mm) of accumulated precipitation. On the first day of April in Vega Alta sunrise is at 6:18 am and sunset at 6:39 pm.
• Luquillo - April »
  On the first day of April in Luquillo, sunrise is at 6:16 am and sunset at 6:36 pm. On the first day of April in Luquillo, sunrise is at 6:16 am and sunset at 6:36 pm.
• Rincon - April »
  In Rincon in April, during 18.8 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. On the first day of April in Rincon, Puerto Rico, sunrise is at 6:22 am and sunset at 6:42 pm.