Portland Temperature by Month
Portland, Victoria, Australia has a consistently moderate climate year-round, with daytime highs averaging 17°C (63°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Portland Monthly Temperatures
Year-round, Portland experiences a consistently moderate climate. Maximum daytime temperatures range from a pleasant 21°C (70°F) in February to a moderate 14°C (57°F) in the coolest month, August. Nighttime temperatures range from 15°C (59°F) in February to 10°C (50°F) in August.
The chart below illustrates the average maximum day and minimum night temperatures in Portland 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.
The chart below shows the average temperature throughout the year:
Temperature: Portland vs Australia
The map below shows the annual temperature across Australia. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
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Portland vs World: Temperature Compared
Portland's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
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.
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.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Portland's weather — including monthly rainfall, sunshine hours, and humidity — visit our Portland climate page.
