Arcos de Valdevez Temperature by Month

Arcos de Valdevez in Norte Region, Portugal sees significant seasonal temperature differences, with daytime highs between 13°C (55°F) in January and 26°C (79°F) in August, averaging 19°C (66°F) annually. Explore the full monthly breakdown below.

Visitors to Arcos de Valdevez will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 15°C (59°F) in August to 4°C (39°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Arcos de Valdevez by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 297 hours of sunshine.

The chart below shows the average temperature throughout the year:

Arcos de Valdevez's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Arcos de Valdevez, January is the coolest month, with average highs of 13°C (55°F) and humidity around 85%, considered very high. In August, the warmest month, temperatures average 26°C (79°F) with 71% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Arcos de Valdevez's weather, including monthly rainfall, sunshine hours, and humidity, visit our Arcos de Valdevez climate page.