Heredia Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Heredia, San José Province, Costa Rica. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's explore all the details to give you a full picture.

Heredia experiences significant rainfall throughout the year, averaging 2965 mm (117 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct rainy season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Heredia can be quite wet during October, receiving approximately 443 mm (17 in) of precipitation over 24 rainy days.

In contrast March, experiences much drier conditions, with 52 mm (2 in) of rainfall, spread across 9 rainy days.

October, the wettest month, has a maximum daytime temperature of 24°C (75°F). The city receives 162 hours of sunshine in this period. During the driest month March you can expect a temperature of 26°C (79°F). For more detailed insights into the city's temperatures, visit our Heredia Temperature page.

Heredia's average annual precipitation is 2965 mm (117 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Heredia's weather, including sunshine hours, humidity levels, and temperature data, visit our Heredia Climate page.