Average Rainy - Precipitation days in San Juan

San Juan sees 33 days of precipitation annually, totaling to 324 mm of rain/snow. Learn more about it on this page.

Monthly Distribution of Rainy Days

December is usually the wettest with 40 mm of rain over 4 rainy days, whereas June averages 12 mm during its a single rainy day.

Amsterdam Precipitation Days Compared World Wide

San Juan's average annual precipitation falls over 33 days. Let's compare this to some popular worldwide tourist destinations:

In Riyadh, Saudi Arabia, there are about 29 precipitation days annually, reflecting its dry desert environment.

In Kuala Lumpur, Malaysia, the city experiences around 212 precipitation days annually, consistent with its tropical rainforest climate.

In Barcelona, Spain, there are approximately 121 precipitation days per year, evenly distributed across the year with no extreme wet or dry seasons.

Chicago, USA, has 133 precipitation days annually, with a mix of rain and snow.

In Shanghai, China, there are approximately 147 precipitation days per year, with a humid subtropical climate.

In Brisbane, Australia, the city averages 123 precipitation days per year, making it wetter than Sydney.

Fun facts about Rain from Around the World

Let’s explore more fascinating precipitation records:

• Tutunendo, Colombia, gets about 340 days of rain every year, which arguably makes it the wettest place in the world.
• On Réunion Island, a tropical cyclone generated 1825 mm in just 24 hours.
• Singapore receives thunder on 167 days in the year and is considered one of the most thunderous cities in the world.
• The smallest drops that fall are called drizzle drops, and they have a diameter of 0.5 mm.
• Some heavy storms generate "diamond dust," which consists of very small ice crystals that float in the air.

For more detailed information about rainfall patterns in San Juan, visit our Rainfall & Precipitation page.