Dominican Republic weather in March

Average highs across the country

20.8–30.7°C

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

Wettest destination

111 mm

Jarabacoa, on about 17 wet days.

Driest destination

7 mm

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

• Biggest change ahead: Samaná Peninsula moves 43 mm wetter from March into April, while The Southwest moves only 18 mm.
• Punta Cana & the East: March averages 43.2 mm of rain across 5 destinations with records, on about 10.8 wet days. That is unchanged from February, and 24 mm below April.
• La Romana & Bayahibe: March averages 23.5 mm of rain across 2 destinations with records, on about 5 wet days. That is 1 mm more than February, and 26 mm below April.
• Santo Domingo & the South: March averages 34.5 mm of rain across 2 destinations with records, on about 8 wet days. That is 4 mm more than February, and 28 mm below April.
• Samaná Peninsula: March averages 50.7 mm of rain across 3 destinations with records, on about 11 wet days. That is 3 mm more than February, and 43 mm below April.
• North Coast: March averages 54.8 mm of rain across 4 destinations with records, on about 8.5 wet days. That is 6 mm less than February, and 25 mm below April.
• Mountains & the Cibao: March averages 88 mm of rain across 3 destinations with records, on about 14.7 wet days. That is 31 mm more than February, and 41 mm below April.
• The Southwest: March averages 18 mm of rain across 2 destinations with records, on about 3 wet days. That is unchanged from February, and 18 mm below April.

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