San Blas Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in San Blas, Riviera Nayarit, Mexico. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.

San Blas is known for its substantial rainfall, with annual precipitation reaching 1330 mm (52 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.

Monthly Precipitation Levels

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

The seasons in San Blas, bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 365 mm (14 in) of precipitation. This rainfall is distributed across 20 rainy days.

In contrast, the driest month, April, experiences much less rainfall, totaling 1.1 mm (0.04 in) over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year.

August, the wettest month, has a maximum daytime temperature of 32°C (90°F). During the driest month April you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our San Blas Temperature page.

San Blas's average annual precipitation is 1330 mm (52 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

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

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

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 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 Blas's weather, including sunshine hours, humidity levels, and temperature data, visit our San Blas Climate page.