Portarlington Temperature by Month

The average annual maximum temperature in Portarlington, Victoria, Australia is 18°C (64°F), with daytime highs ranging from 14°C (57°F) in July to 23°C (73°F) in February. This page covers monthly averages, day-night differences, and how Portarlington compares to cities worldwide.

The climate in Portarlington experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 17°C (63°F) in February to 9°C (48°F) in July.

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

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. February, the warmest month, gets 227 hours of sunshine.

The chart below shows the average temperature throughout the year:

Portarlington's average annual maximum temperature is 18°C (64°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.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

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 Portarlington, July is the coolest month, with average highs of 14°C (57°F) and humidity around 63%, considered 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 Portarlington's weather, including monthly rainfall, sunshine hours, and humidity, visit our Portarlington climate page.