| < May >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in San Juan in May is fairly hot at 25.45 °C (77.81 °F).
- Afternoons can be very hot with average high temperatures reaching 31 °C (87.8 °F).
- Overnight temperatures are generally warm with an average low of 19.9 °C (67.8 °F).
- In May there is a range/ variation of daily average temperatures of 11.1 °C (20 °F).
- The weather in May is very faintly moist. Some 141.5mm (5.6in) of H2O is deposited.
- The shortest day is 12:48 long and the longest day is 13:09 long with an average length of 13:00.
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Weather Trend Graph for May in San Juan, Dominican Republic
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