Portland Weather in March

The climate in Portland during March can be summarized as cool and a little damp.

March is in the spring in Portland and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cold 6°C (42°F), whilst at night -4°C (25°F) is normal.

On average March is the 5th wettest month of the year in Portland with around 99mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 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 March 2025.