August weather forecast
Puerto Rico, USA

August in Puerto Rico stands as the zenith of the tropical summer. The island experiences temperatures that fluctuate between lows around 77°F (25°C) and can peak at an intense 91°F (32.8°C). This makes August one of the hottest months of the year, a slight but noticeable escalation from July's warmth, further intensified by heightened humidity levels.

Regions in the northern sector, encompassing areas like San Juan, maintain a marginally cooler atmosphere compared to the southern parts, though the difference becomes less pronounced during these peak summer months. In the Cordillera Central Mountain Range, towns such as Jayuya and Aibonito continue to showcase relatively cooler climates, though even these high-altitude areas feel the heat of August.

Rainfall remains a constant companion in August. The pattern of clear mornings followed by robust afternoon showers or thunderstorms persists. Coastal regions, from towns like Rincon to Naguabo, bear the brunt of this tropical climate, marked by sweltering heat and regular downpours.

Of significant note is that August is deep within the hurricane season, and historically, the probability of tropical cyclones affecting the region rises. The Atlantic becomes a hotbed for storm formation, and Puerto Rico's position makes it susceptible to potential impacts. Residents and visitors alike remain on heightened alert, monitoring weather systems and ensuring safety precautions.

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• San Juan - August »
  On the last day of August, in San Juan, Puerto Rico, sunrise is at 6:09 am and sunset at 6:39 pm AST. In San Juan in August, during 14.8 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.
• Fajardo - August »
  The month with the most rainfall in Fajardo is August, when the rain falls for 21.3 days and typically aggregates up to 2.83" (72mm) of precipitation. August, recognised by an average high temperature of 84.2°F (29°C) and a low of 80.2°F (26.8°C), is Fajardo's warmest month.
• Toa Baja - August »
  In Toa Baja in August, during 19.7 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Toa Baja's warmest month, August, registers temperatures that range from a high of 85.5°F (29.7°C) to a low of 78.4°F (25.8°C).
• Aguadilla - August »
  The presence of August in Aguadilla is marked by an average high temperature of a still warm 84.7°F (29.3°C), reflecting July's climate closely. In August, the average ocean temperature in Aguadilla is 84.4°F (29.1°C).
• Vega Baja - August »
  On the first day of August in Vega Baja sunrise is at 6:03 am and sunset at 7:00 pm. Vega Baja's temperature records reveal August as the warmest month, marked by average highs of 85.6°F (29.8°C) and lows of 78.4°F (25.8°C).
• Juana Díaz - August »
  In Juana Díaz in August, during 22.8 rainfall days, 3.62" (92mm) of precipitation is typically accumulated. In Juana Díaz in August, the average water temperature is 84.6°F (29.2°C).
• Adjuntas - August »
  The average high-temperature and low-temperature in Adjuntas during August are 86.5°F (30.3°C) and 76.6°F (24.8°C) respectively. In August, the average relative humidity in Adjuntas is 77%.
• Cabo Rojo - August »
  In Cabo Rojo the average relative humidity in August is 77%. In August, the average relative humidity in Cabo Rojo, Puerto Rico, is 77%.
• Guánica - August »
  In Guánica, Puerto Rico, August is identified by the highest average temperatures, reaching a peak of 86.5°F (30.3°C) and a low of 76.6°F (24.8°C). In Guánica, snow does not fall in January through August, October through December.
• Vega Alta - August »
  In Vega Alta, Puerto Rico, in August, it is raining for 19.7 days, with typically 2.44" (62mm) of accumulated precipitation. On the last day of August, in Vega Alta sunrise is at 6:10 am and sunset at 6:40 pm AST.
• Luquillo - August »
  The month with the most rainfall in Luquillo is August, when the rain falls for 21.3 days and typically aggregates up to 2.83" (72mm) of precipitation. On the first day of August in Luquillo sunrise is at 6:00 am and sunset at 6:57 pm.
• Rincon - August »
  In Rincon in August, the average water temperature is 84.4°F (29.1°C). August's average low-temperature in Rincon, Puerto Rico, is a still moderately hot 79.9°F (26.6°C), reflecting a minor difference from the day's peak temperatures.