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Weather Comparison
Side-by-side weather comparison for May
| Metric | Santo Domingo | San Juan | Better |
|---|---|---|---|
| Average HighHigher is warmer | 29°C (84°F) | 30°C (86°F)▲ | San Juan |
| Average LowHigher is milder | 22°C (72°F) | 23°C (73°F)▲ | San Juan |
| Rain DaysFewer is drier | 21 days | 17 days▲ | San Juan |
| PrecipitationLess is drier | 120 mm | 108 mm▲ | San Juan |
| Sunshine HoursMore is sunnier | 12h/day | 12h/day | Tie |
| HumidityLower is more comfortable | 78% | 78% | Tie |
| UV IndexLower is safer | 9 | 9 | Tie |
| Wind SpeedCalmer is better | 13 km/h▲ | 19 km/h | Santo Domingo |
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, San Juan edges ahead as the better destination in May. San Juan offers 12 hours of daily sunshine with only 17 rain days, while Santo Domingo sees 12 sunshine hours and 21 rain days.
Santo Domingo can feel quite hot at 29°C, so plan for heat. San Juan runs hot at 30°C.
For travelers who prioritize dry weather, San Juan is the stronger choice in May.
Santo Domingo reaches an average high of 29°C (84°F) and drops to 22°C (72°F) at night during May. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.
San Juan averages 30°C (86°F) for the high and 23°C (73°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 May.
Santo Domingo receives approximately 120 mm of rainfall across 21 rain days during May. Rain is frequent, so waterproof gear is essential.
San Juan sees 108 mm over 17 rain days. That makes San Juan the drier option by 4 rain days and 12 mm of total precipitation.
Both cities share similar humidity levels at 78%.
Highs of 29°C, lows of 22°C, 21 rain days
Highs of 30°C, lows of 23°C, 17 rain days
Pack for both: lightweight breathable clothing, sunscreen SPF 50+, sunglasses, a wide-brimmed hat, waterproof jacket, compact umbrella, waterproof shoes, moisture-wicking fabrics. These items are useful in either destination during May.
The table below shows average high temperatures and rain days for every month. May is highlighted for quick reference.
| Month | Santo Domingo | San Juan | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 27°C | 12d | 28°C | 11d |
| Feb | 28°C | 11d | 29°C | 9d |
| Mar | 28°C | 12d | 29°C | 9d |
| Apr | 29°C | 16d | 30°C | 12d |
| May | 29°C | 21d | 30°C | 17d |
| Jun | 30°C | 22d | 31°C | 14d |
| Jul | 30°C | 22d | 31°C | 17d |
| Aug | 30°C | 22d | 31°C | 19d |
| Sep | 30°C | 21d | 31°C | 21d |
| Oct | 29°C | 22d | 30°C | 21d |
| Nov | 28°C | 16d | 29°C | 19d |
| Dec | 28°C | 12d | 28°C | 13d |
Santo Domingo Weather in May
Full forecast, packing tips, and activities
San Juan Weather in May
Full forecast, packing tips, and activities