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 »
  August, recording an average high temperature of 85.1°F (29.5°C) and a low temperature of 79.2°F (26.2°C), is San Juan's warmest month. In San Juan the average seawater temperature in August is 84.6°F (29.2°C).
• 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 stands out in the calendar for the highest air temperature recorded in the year in Fajardo, touching a high of 84.2°F (29°C).
• Toa Baja - August »
  In Toa Baja during August, the rain falls for 19.7 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Toa Baja in August, it is raining for 19.7 days, with typically 2.44" (62mm) of accumulated precipitation.
• Aguadilla - August »
  On the first day of August in Aguadilla sunrise is at 6:06 am and sunset at 7:03 pm. In Aguadilla in August, it is raining for 22.6 days, with typically 3.66" (93mm) of accumulated precipitation.
• Vega Baja - August »
  Vega Baja's August weather, marked by an average high temperature of 85.6°F (29.8°C) and an average low temperature of 78.4°F (25.8°C), is the warmest in the year. In Vega Baja the average relative humidity in August is 78%.
• Juana Díaz - August »
  With its high average temperature of 86.5°F (30.3°C) and a low of 76.6°F (24.8°C), August is regarded as the warmest month in Juana Díaz. August is the month when Juana Díaz's temperatures reach their peak, with averages of 86.5°F (30.3°C) and lows of 76.6°F (24.8°C).
• Adjuntas - August »
  Adjuntas registers the average highest temperatures during August, with peaks of 86.5°F (30.3°C) and lows of 76.6°F (24.8°C). In Adjuntas in August, it is raining for 20.2 days, with typically 3.11" (79mm) of accumulated precipitation.
• Cabo Rojo - August »
  August, on average, is the warmest month in Cabo Rojo registering a high temperature of 85.8°F (29.9°C) and a low of 78.8°F (26°C). In Cabo Rojo, during August, the rain falls for 23.8 days and regularly aggregates up to 3.39" (86mm) of precipitation.
• Guánica - August »
  Guánica reaches its highest average temperatures in August, measuring 86.5°F (30.3°C) at the peak and 76.6°F (24.8°C) at the lowest. On the first day of August in Guánica, sunrise is at 6:06 am and sunset at 7:01 pm.
• Vega Alta - August »
  August surpasses all preceding months with the highest recorded temperature of 85.5°F (29.7°C) in Vega Alta. With average high and low temperatures of 85.5°F (29.7°C) and 78.4°F (25.8°C) respectively, August is Vega Alta's warmest month.
• 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. August is the month with the most rainfall in Luquillo, Puerto Rico.
• Rincon - August »
  In August, the average ocean temperature in Rincon is 84.4°F (29.1°C). August trails closely behind July, replicating many weather characteristics that define Rincon, Puerto Rico's summer.