San Juan vs Santo Domingo

San Juan and Santo Domingo are closely matched in January. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

San Juan sits in the comfortable travel range at 28°C. Santo Domingo is also comfortable at 27°C.

For travelers who prioritize dry weather, San Juan is the stronger choice in January. Santo Domingo receives 9 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

San Juan reaches an average high of 28°C (82°F) and drops to 21°C (70°F) at night during January. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Santo Domingo averages 27°C (81°F) for the high and 20°C (68°F) for the low, with a daily range of 7°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in January.

San Juan receives approximately 79 mm of rainfall across 7 rain days during January. Rain is occasional, so a light rain jacket should suffice.

Santo Domingo sees 33 mm over 12 rain days. That makes San Juan the drier option by 5 rain days and 46 mm of total precipitation.

Both cities share similar humidity levels at 78%.