Portland Weather in December

The climate in Portland during December can be summarized as cold and reasonably dry.

December is in the winter in Portland and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 3°C (37°F), whilst at night -6°C (21°F) is normal.

On average December is the 4th driest month of the year in Portland with around 70mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.

On the flip side this corresponds to an average of 3.7 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Portland in December 2024.