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.
Arcos de Valdevez Monthly Temperatures
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:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in May
Historical Arcos de Valdevez Temperatures: 1976-2026
Browse day-by-day temperature records for Arcos de Valdevez spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Arcos de Valdevez vs Portugal
The map below shows the annual temperature across Portugal. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Arcos de Valdevez vs World: Temperature Compared
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.
What Does the Temperature Feel Like in Arcos de Valdevez?
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.
