Portonovo Temperature by Month

The average annual maximum temperature in Portonovo, Galicia, Spain is 19°C (66°F), with daytime highs ranging from 14°C (57°F) in January to 24°C (75°F) in August. This page covers monthly averages, day-night differences, and how Portonovo compares to cities worldwide.

Portonovo sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, with lows ranging from 16°C (61°F) in August to 8°C (46°F) in January.

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

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 297 hours of sunshine.

The chart below shows the average temperature throughout the year:

Portonovo'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:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

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 Portonovo, January is the coolest month, with average highs of 14°C (57°F) and humidity around 85%, considered very high. In August, the warmest month, temperatures average 24°C (75°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.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

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