Viseu Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Viseu, Beiras 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.

Viseu experiences significant rainfall throughout the year, averaging 1118 mm (44 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

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

The climate in Viseu shows significant variation throughout the year. Expect 150 mm (5.9 in) of precipitation during the wettest month October, distributed over 13 rainy days.

In contrast, July offers drier and sunnier days, with around 17 mm (0.7 in) of rainfall over 6 rainy days.

October, the wettest month, has a maximum daytime temperature of 20°C (68°F). The city receives 166 hours of sunshine in this period. During the driest month July you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our Viseu Temperature page.

Viseu's average annual precipitation is 1118 mm (44 in). Let's compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages 964 mm (38 in), with snowy winters and rainy summers.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

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