Monterrey Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Monterrey, Nuevo León, Mexico. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.

Generally, Monterrey receives mid-range precipitation levels, with 831 mm (33 in) annually.

Monthly Precipitation Levels

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

Monterrey can be quite wet during September, receiving approximately 150 mm (5.9 in) of precipitation over 7 rainy days.

In contrast December, experiences much drier conditions, with 38 mm (1.5 in) of rainfall, spread across 3 rainy days.

September, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 200 hours of sunshine in this period. During the driest month December you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our Monterrey Temperature page.

Monterrey's average annual precipitation is 831 mm (33 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 Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

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

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