São Lourenço do Douro Temperature by Month

São Lourenço do Douro in Norte Region, Portugal sees significant seasonal temperature differences, with daytime highs between 13°C (55°F) in January and 28°C (82°F) in August, averaging 20°C (68°F) annually. Explore the full monthly breakdown below.

The climate in São Lourenço do Douro is dynamic, ranging widely from moderate in winter to comfortable in summer. Nights are significantly colder, with lows dropping 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 São Lourenço do Douro by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 295 hours of sunshine.

The chart below shows the average temperature throughout the year:

São Lourenço do Douro's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

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

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

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 São Lourenço do Douro, January is the coolest month, with average highs of 13°C (55°F) and humidity around 81%, considered very high. In August, the warmest month, temperatures average 28°C (82°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 São Lourenço do Douro this rarely lasts long on the ground.

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