Corvallis (OR) Temperature by Month

Corvallis in Oregon, United States of America sees significant seasonal temperature differences, with daytime highs between 8°C (46°F) in December and 28°C (82°F) in August, averaging 17°C (63°F) annually. Explore the full monthly breakdown below.

The weather in Corvallis experiences significant differences between warm and cold seasons, with big shifts in temperature. At night, minimum temperatures range from 11°C (52°F) in August to 1°C (34°F) in December.

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

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 321 hours of sunshine.

The chart below shows the average temperature throughout the year:

Corvallis'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:

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.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

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 Corvallis's weather, including monthly rainfall, sunshine hours, and humidity, visit our Corvallis climate page.