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

This page shows both the average monthly rainfall and the number of rainy days in Guimarães, Norte Region, Portugal. This average is based on long-term data collected between 1990 and 2020. Let’s explore the details to provide you with a complete overview.

Guimarães experiences significant rainfall throughout the year, averaging 1653 mm of precipitation annually.

Monthly Precipitation Levels

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

The seasons in Guimarães, bring significant changes in precipitation. The wettest month, December, receives heavy rainfall, with an average of 218 mm of precipitation.

This rainfall is distributed across 16 rainy days. In contrast, the driest month, July, experiences much less rainfall, totaling 33 mm over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

December, the wettest month, has a maximum daytime temperature of 14°C. The city receives 124 hours of sunshine in this period. During the driest month July you can expect a temperature of 28°C. For more detailed insights into the city’s temperatures, visit our Guimarães 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

Guimarães’s average annual precipitation is 1653 mm. Let’s compare this to some popular worldwide tourist destinations:

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

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

Adelaide, Australia, enjoys 511 mm of annual precipitation, with dry summers and wet winters.

Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

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.

Global Warming and Precipitation

Climate change is affecting precipitation patterns worldwide, including Guimarães:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

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