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Average Monthly Sunshine in San Juan

The graphs on this page shows the average number of hours per month and per day that San Juan receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in San Juan varies. It peaks at 350 hours in December and drops to 208 hours in June. The total annual amount of sun is 3365 hours.

Daily hours of sunshine

In San Juan, summer days are longer and more sunny, with daily sunshine hours peaking at 11.7 hours in December. As the darker season arrives, the brightness of the sun becomes less. June sees a soft sun for only 6.9 hours per day.

San Juan’s total hours of sunshine compared to other major cities

San Juan enjoys an average of 3365 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

In Seoul, South Korea, there are approximately 2133 hours of sunshine per year, mostly during spring and autumn.

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

Other climate information

December, San Juan’s wettest month, receives 37 mm of rainfall and has a maximum daytime temperature of 32°C. During the driest month June you can expect a temperature of 18°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our San Juan Precipitation page.


Forecast: is it sunny in San Juan?

Wed   Jan 15
40°C | 23°C
SE 6 m/s
almost clear and no rain

almost clear and no rain

Thu   Jan 16
35°C | 23°C
SE 6 m/s
2.7 mm
partly cloudy and thunder

partly cloudy and thunder

Fri   Jan 17
37°C | 20°C
N 5 m/s
almost clear and no rain

almost clear and no rain

Interested in more climate information?

This site provides you with all the information you need about the climate in San Juan.

Our site offers climate and forecast data for every country in the world. Are you going to Argentina? On this website you can find historical weather averages for many cities in Argentina. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.