Santa Cruz do Douro Temperature by Month

Santa Cruz do Douro, Portugal has an average annual maximum temperature of 19°C (66°F), ranging from 12°C (54°F) in January to 27°C (81°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

In Santa Cruz do Douro, temperatures can shift dramatically between warm in summer and cold in winter. Nights follow the same pattern, with lows ranging from 15°C (59°F) in August to 3°C (37°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Santa Cruz do Douro 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 295 hours of sunshine.

The chart below shows the average temperature throughout the year:

Santa Cruz do Douro'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:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 Santa Cruz do Douro, January is the coolest month, with average highs of 12°C (54°F) and humidity around 81%, considered very high. In August, the warmest month, temperatures average 27°C (81°F) with 73% 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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Santa Cruz do Douro this rarely lasts long on the ground.

For more on Santa Cruz do Douro's weather, including monthly rainfall, sunshine hours, and humidity, visit our Santa Cruz do Douro climate page.