San Ignacio Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in San Ignacio, San José Province, Costa Rica. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.

San Ignacio experiences significant rainfall throughout the year, averaging 4683 mm (184 in) of precipitation annually.

Monthly Precipitation Levels

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

The climate in San Ignacio shows significant variation throughout the year. Expect 643 mm (25 in) of precipitation during the wettest month September, distributed over 24 rainy days.

In contrast, February offers drier and sunnier days, with around 70 mm (2.8 in) of rainfall over 9 rainy days.

September, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 147 hours of sunshine in this period. During the driest month February you can expect a temperature of 26°C (79°F). For more detailed insights into the city's temperatures, visit our San Ignacio Temperature page.

San Ignacio's average annual precipitation is 4683 mm (184 in). Let's compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.

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

Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

The proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

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