Portland Weather in December

What's the weather like in Portland (Maine) in December 2024?

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

December is in the winter in Portland and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (36°F), whilst at night -8°C (18°F) is normal.

Portland weather averages (imperial / metric)
Daytime temperature 2.1°C 35.7°F
Nightly temperature -7.7°C 18.2°F
Average temperature -2.8°C 27°F
Daily sunshine 5 hrs
Avg rainfall 117 mm 4.6 ins
Rainy days 12 days
Sea temperature 7°C 44.5°F
Humidity 70%
Windspeed 15.1kph 9 mph

On average December is the 2nd wettest month of the year in Portland with around 117mm 4.6 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 5 hours of sunshine per day.

December temperatures in Portland

Portland average temperature in December

December rainfall

Portland average rain in December

December hourly sunshine

Portland average rain in December

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.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Portland weather stats

Portland weather statistics
Hottest month: July 25.9°C 78.6°F
Driest month: August 75mm 3ins
Sunniest month: August 9.2hrs
Coldest month: January -0.8°C 30.6°F
Wettest month: November 131mm 5.2ins
Map showing location of Portland (43.66147, -70.25533) Portland map pin © Google

Locations nearby

Top United States locations