Alter do Chão Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Alter do Chão. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

On average, Alter do Chão receives a reasonable amount of rainfall, with an annual precipitation of 615 mm.

Monthly Precipitation Levels

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

The seasons in Alter do Chão, bring significant changes in precipitation. The wettest month, October, receives moderate rainfall, with an average of 84 mm of precipitation.

This rainfall is distributed across 11 rainy days. In contrast, the driest month, July, experiences much less rainfall, totaling 4.3 mm over 3 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

October, the wettest month, has a maximum daytime temperature of 24°C. During the driest month July you can expect a temperature of 33°C. For more detailed insights into the city’s temperatures, visit our Alter do Chão Temperature page.

Annual Precipitation in Portugal

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

Amsterdam Precipitation Compared World Wide

Alter do Chão’s average annual precipitation is 615 mm. Let’s compare this to some popular worldwide tourist destinations:

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

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

In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.

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

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

• 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 Alter do Chão’s weather, including sunshine hours, humidity levels, and temperature data, visit our Alter do Chão Climate page.