Rio Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Rio. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s explore all the details to give you a full picture.

Rio experiences significant rainfall throughout the year, averaging 1433 mm of precipitation annually.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wet season, November receives substantial rainfall, averaging 198 mm of precipitation, recorded across 13 rainy days.

In contrast, the drier season, July brings less rainfall, with 48 mm over 8 rainy days.

November, the city’s wettest month, has a maximum daytime temperature of 13°C. During the driest month July you can expect a temperature of 26°C. For more detailed insights into the city’s temperatures, visit our Rio Temperature page.

Annual Precipitation in Italy

The map below shows the annual precipitation across Italy. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Rio’s average annual precipitation is 1433 mm. Let’s compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages [964 mm], with snowy winters and rainy summers.

Beijing, China, receives 560 mm of annual precipitation, concentrated in the summer months.

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

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

How is Precipitation Measured?

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.

Interesting weather facts

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm 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 Rio’s weather, including sunshine hours, humidity levels, and temperature data, visit our Rio Climate page.