Dominican Republic weather in May

Average highs across the country

22–32°C

Constanza coolest, Pedernales / Bahía de las Águilas warmest. No single national average is shown.

Wettest destination

260 mm

Constanza, on about 26 wet days.

Driest destination

13 mm

Pedernales / Bahía de las Águilas, on about 1 wet days.

• Biggest change ahead: Mountains & the Cibao moves 73 mm drier from May into June, while The Southwest moves only 6 mm.
• Punta Cana & the East: May averages 97 mm of rain across 5 destinations with records, on about 20 wet days. That is 30 mm more than April, and 15 mm above June.
• La Romana & Bayahibe: May averages 89 mm of rain across 2 destinations with records, on about 18 wet days. That is 40 mm more than April, and 17 mm above June.
• Santo Domingo & the South: May averages 104.5 mm of rain across 2 destinations with records, on about 19 wet days. That is 42 mm more than April, and 7 mm above June.
• Samaná Peninsula: May averages 133.3 mm of rain across 3 destinations with records, on about 23 wet days. That is 40 mm more than April, and 33 mm above June.
• North Coast: May averages 88.3 mm of rain across 4 destinations with records, on about 14.5 wet days. That is 9 mm more than April, and 34 mm above June.
• Mountains & the Cibao: May averages 192.3 mm of rain across 3 destinations with records, on about 23.7 wet days. That is 64 mm more than April, and 73 mm above June.
• The Southwest: May averages 51.5 mm of rain across 2 destinations with records, on about 6 wet days. That is 16 mm more than April, and 6 mm below June.

Nothing in this month’s climate table describes seaweed on a beach. Open the sargassum planner and set the month to May — 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.