Dominican Republic weather in October

Average highs across the country

22.2–31.6°C

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

Wettest destination

164 mm

Constanza, on about 25 wet days.

Driest destination

93 mm

Punta Rucia / Cayo Arena, on about 15 wet days.

• Biggest change ahead: The Southwest moves 97 mm drier from October into November, while Punta Cana & the East moves only 14 mm.
• Punta Cana & the East: October averages 126.2 mm of rain across 5 destinations with records, on about 23 wet days. That is 18 mm more than September, and 14 mm above November.
• La Romana & Bayahibe: October averages 105 mm of rain across 2 destinations with records, on about 21.5 wet days. That is 6 mm less than September, and 52 mm above November.
• Santo Domingo & the South: October averages 124.5 mm of rain across 2 destinations with records, on about 19 wet days. That is 9 mm less than September, and 46 mm above November.
• Samaná Peninsula: October averages 121.7 mm of rain across 3 destinations with records, on about 22.7 wet days. That is 13 mm more than September, and 18 mm above November.
• North Coast: October averages 102.8 mm of rain across 4 destinations with records, on about 16.8 wet days. That is 24 mm more than September, and 15 mm above November.
• Mountains & the Cibao: October averages 129.3 mm of rain across 3 destinations with records, on about 22.3 wet days. That is 11 mm less than September, and 38 mm above November.
• The Southwest: October averages 136.5 mm of rain across 2 destinations with records, on about 10.5 wet days. That is 29 mm more than September, and 97 mm above November.

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