Nicoya Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Nicoya, Guanacaste, Costa Rica. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's explore the details to provide you with a complete overview.

Nicoya experiences significant rainfall throughout the year, averaging 2421 mm (95 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry and 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))

The climate in Nicoya shows significant variation throughout the year. Expect 418 mm (16 in) of precipitation during the wettest month October, distributed over 21 rainy days.

In contrast, January offers drier and sunnier days, with around 11 mm (0.4 in) of rainfall over 8 rainy days.

October, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 171 hours of sunshine in this period. During the driest month January you can expect a temperature of 33°C (91°F). For more detailed insights into the city's temperatures, visit our Nicoya Temperature page.

Nicoya's average annual precipitation is 2421 mm (95 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.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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 U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

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