Río San Juan Weather in December
December in Río San Juan sees daytime temperatures around 28°C (82°F) and lows of 23°C (73°F) at night. With around 106 mm (4.2 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Río San Juan in December
You can typically expect 15 days of rain this month, averaging around 106 mm (4.2 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Río San Juan in December
December in Río San Juan sees highs of 28°C (82°F) and lows of 23°C (73°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are mild at around 23°C (73°F), which is comfortable for most people.If you prefer enjoying temperate temperatures and rain-free days, January, February and March typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Dominican Republic, check out our Río San Juan's climate page.
Río San Juan Temperature in December
Min Temperature
23°C (73°F)
Max Temperature
28°C (82°F)
Chance of Rain
48%
Precipitation
106 mm (4.2 in)
Rainy days
15 days
Humidity
81% *
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Río San Juan typically stay consistent throughout December, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 21°C (70°F).
Average temperatures in December
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Río San Juan in December
Browse day-by-day weather records for Río San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Río San Juan historical weather extremes in December
Based on weather observations in Río San Juan between 1997 and 2025, these are the recorded extremes during December.
- On December 1, 1997, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- On December 31, 2003, Río San Juan saw its coldest December day with temperatures maxing out at 20°C (68°F).
- The lowest overnight temperature recorded in December was 14°C (57°F) (December 30, 2025).
Best Places in the Dominican Republic in December
Find out more about the weather in the Dominican Republic and which places have the best travel conditions in this month. See all of the Dominican Republic in December →
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What to Wear in Río San Juan in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho.What To Do in Río San Juan in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Dominican Republic, check out our Río San Juan's climate page.
See the full Río San Juan climate overview or explore weather in the Dominican Republic.
