Climate of San Juan
San Juan has a tropical rainforest climate. It is usually (very) warm, humid and rainy all year round. The average annual temperature for San Juan is 28° degrees and there is about 199 mm of rain in a year. It is dry for 146 days a year with an average humidity of 78% and an UV-index of 7.
Climate averages for the whole year
- Day: the average daily temperature during the day is between 27°C and 29°C
- Night:the average nighttime temperature is between 23°C and 27°C
- Sea temperature: the sea temperature is between 27°C and 32°C
- Rain: it rains 133 days and there is a total of approximately 199 mm rainfall
- Sun hours: throughout the year there are 3383 sun hours
Maximum temperature: | between 27°C and 29°C |
Warmest month: | 29°C in June |
Coldest month: | 27°C in January |
Night temperature: | between 23°C and 27°C |
Sea temperature: | between 27°C and 32°C |
Dry days: | 232 days |
Days with rain: | 133 days |
Days with snow: | 0 days |
Total rain sum: | 199 mm |
Hours of sunshine: | 3383 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for San Juan.
Precipitation graph
This graph shows the average amount of rainfall per month for San Juan.
Climate table of San Juan
In this climate table you can see at a glance what the average weather per month is for San Juan. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for San Juan might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°C) | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 27 |
Night temp. (°C) | 24 | 24 | 23 | 24 | 25 | 26 | 26 | 27 | 27 | 26 | 26 | 25 |
Water temp. (°C) | 27 | 28 | 31 | 27 | 30 | 32 | 31 | 30 | 32 | 30 | 28 | 29 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (mm) | 11 | 10 | 14 | 10 | 18 | 7 | 13 | 18 | 17 | 33 | 33 | 15 |
Days with rain | 10 | 10 | 11 | 9 | 12 | 7 | 10 | 12 | 10 | 14 | 15 | 13 |
Dry days | 21 | 18 | 20 | 21 | 19 | 23 | 21 | 19 | 20 | 17 | 15 | 18 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 9 | 9 | 9 | 9 | 11 | 12 | 11 | 10 | 10 | 8 | 7 | 7 |
Wind force (Bft) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
UV-index | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
Best time to visit San Juan
The best time to visit San Juan in Puerto Rico is from January through December. In this period you have a warm temperature and almost no precipitation. The highest average temperature in San Juan is 29°C in June and the lowest is 27°C in January. The average water temperature is between 27°C and 32°C.
Climate of San Juan by month
What is the average climate in a given month for San Juan? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
San Juan weather experiences
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