Dominican Republic weather in August

Average highs across the country

23.1–34.5°C

Constanza coolest, Punta Rucia / Cayo Arena warmest. No single national average is shown.

Wettest destination

171 mm

Constanza, on about 26 wet days.

Driest destination

29 mm

Pedernales / Bahía de las Águilas, on about 2 wet days.

• Biggest change ahead: The Southwest moves 45 mm wetter from August into September, while Punta Cana & the East moves only 3 mm.
• Punta Cana & the East: August averages 111.6 mm of rain across 5 destinations with records, on about 20 wet days. That is 4 mm more than July, and 3 mm above September.
• La Romana & Bayahibe: August averages 80 mm of rain across 2 destinations with records, on about 19.5 wet days. That is 16 mm more than July, and 31 mm below September.
• Santo Domingo & the South: August averages 122.5 mm of rain across 2 destinations with records, on about 19.5 wet days. That is 6 mm more than July, and 11 mm below September.
• Samaná Peninsula: August averages 112.3 mm of rain across 3 destinations with records, on about 22.3 wet days. That is 5 mm more than July, and 4 mm above September.
• North Coast: August averages 47.5 mm of rain across 4 destinations with records, on about 8 wet days. That is 21 mm more than July, and 31 mm below September.
• Mountains & the Cibao: August averages 115.3 mm of rain across 3 destinations with records, on about 22 wet days. That is 27 mm more than July, and 25 mm below September.
• The Southwest: August averages 63 mm of rain across 2 destinations with records, on about 6.5 wet days. That is 4 mm more than July, and 45 mm below September.

Nothing in this month’s climate table describes seaweed on a beach. Open the sargassum planner and set the month to August — it runs on its own live data layer and its own model version.

Source

Open-Meteo climate reanalysis and Copernicus ERA5-Land reanalysis — open-meteo.com and Copernicus ERA5-Land hourly time series

Baseline

30-year averages, 1995–2024

Climate version

climate-v1.1-1995-2024

• These are 30-year averages, 1995–2024, sampled at each destination's registry coordinates. They are NOT a WMO standard normal, and they are NOT a forecast.
• Celsius, rainfall and wet-day values are transcribed exactly as supplied. Fahrenheit is derived from Celsius, never supplied.
• 17 destinations: monthly values from Open-Meteo climate reanalysis, transcribed as supplied.
• 4 destinations (Jarabacoa, Constanza, Juan Dolio, Punta Rucia): computed by Transekur from Copernicus ERA5-Land hourly reanalysis (CC-BY 4.0), 1995–2024, aggregated over local Santo Domingo calendar days; a wet day is ≥ 1.0 mm.
• Values represent ~9 km reanalysis grid cells: Jarabacoa 19.1,-70.6; Constanza 18.9,-70.7; Juan Dolio 18.5,-69.4 (inland representative cell a few km from the beachfront — the coastal cell is ocean in this dataset); Punta Rucia 19.6,-71.3.
• Mountain grid cells can sit above town centers, so in-town temperatures can run warmer than the grid average. Reanalysis is modeled data, not station observations.
• Wet days for the 17 Open-Meteo destinations are days with measurable precipitation as supplied by that source; that baseline does not define a millimetre threshold, so none is stated for them.