Longueira Temperature by Month

The average annual maximum temperature in Longueira, Alentejo, Portugal is 21°C (70°F), with daytime highs ranging from 16°C (61°F) in January to 27°C (81°F) in August. This page covers monthly averages, day-night differences, and how Longueira compares to cities worldwide.

Visitors to Longueira will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 18°C (64°F) in August to 9°C (48°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Longueira 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 340 hours of sunshine.

The chart below shows the average temperature throughout the year:

Longueira's average annual maximum temperature is 21°C (70°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.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

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

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

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 Longueira, January is the coolest month, with average highs of 16°C (61°F) and humidity around 76%, considered high. In August, the warmest month, temperatures average 27°C (81°F) with 62% 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 Longueira's weather, including monthly rainfall, sunshine hours, and humidity, visit our Longueira climate page.