Puerto RicoThe weather in May in San Juan
It's hot in May in San Juan with an average temperature of 31°C. Temperatures this month range from a low of 31°C to a high of 32°C. At night, you can expect temperatures between 25°C and 26°C.
Looking for sun? May isn’t a good month to be in San Juan. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for San Juan, Puerto Rico. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 35°C in 2020, San Juan reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 25°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 21°C to a highest value of 28°C.
Water temperature
The water temperature at San Juan is 30°C this month. It’s really warm, perfect for a swim.
Rainfall amount
In May, there is an average of 100 mm of precipitation, spread over 14 days. The wind speed is around 4 Bft, mostly coming from the East.
Daily weather in May for San Juan
Click on any day in May to get detailed info about the usual weather on that day in San Juan. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| San Juan | New York | |
|---|---|---|
| Average temperature | 31°C | 22°C |
| Max. temperature | 32°C | 28°C |
| Min. temperature | 25°C | -5°C |
| Total precipitation | 100 mm | 105 mm |
| Rainy days | 14 days | 14 days |
Start of May
The month of May starts in San Juan with hot temps, averaging around 32°C during the day and nights around 25°C.
Mid May
By mid-May, daytime temps stay steady at around 32°C, with nights around 26°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in San Juan is around 32°C, while nighttime temps are about 26°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in San Juan runs from June to November.
Check out the climate of San Juan for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in San Juan, Puerto Rico. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in San Juan
Temperature in May in San Juan over the years
Precipitation charts
These charts show the average amount of precipitation in May in San Juan, Puerto Rico. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in San Juan
Total precipitation in May in San Juan over the years
Daily UV index in May in San Juan
This chart shows the average daily UV index in May in San Juan, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in San Juan
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Average weather in San Juan by month
Click on a month below to see detailed weather info for San Juan. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.