Dominican Republic weather in January

Average highs across the country

19.9–29.7°C

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

Wettest destination

96 mm

Miches / Playa Esmeralda, on about 17 wet days.

Driest destination

7 mm

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

• Biggest change ahead: Punta Cana & the East moves 8 mm drier from January into February, while La Romana & Bayahibe moves only 1 mm.
• Punta Cana & the East: January averages 51 mm of rain across 5 destinations with records, on about 12.6 wet days. That is 21 mm less than December, and 8 mm above February.
• La Romana & Bayahibe: January averages 24 mm of rain across 2 destinations with records, on about 5.5 wet days. That is 1 mm less than December, and 1 mm above February.
• Santo Domingo & the South: January averages 30 mm of rain across 2 destinations with records, on about 8 wet days. That is 11 mm less than December, and 1 mm below February.
• Samaná Peninsula: January averages 44.3 mm of rain across 3 destinations with records, on about 12 wet days. That is 19 mm less than December, and 3 mm below February.
• North Coast: January averages 55.8 mm of rain across 4 destinations with records, on about 8.3 wet days. That is 15 mm less than December, and 5 mm below February.
• Mountains & the Cibao: January averages 58 mm of rain across 3 destinations with records, on about 12 wet days. That is 1 mm more than December, and 1 mm above February.
• The Southwest: January averages 12.5 mm of rain across 2 destinations with records, on about 3 wet days. That is 3 mm less than December, and 6 mm below February.

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