Portland Weather in May

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

The climate in Portland during May can be summarized as mild and a little damp.

May is in the spring in Portland and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 7°C (44°F) is normal.

Portland weather averages (imperial / metric)
Daytime temperature 17.6°C 63.6°F
Nightly temperature 6.5°C 43.6°F
Average temperature 12°C 53.6°F
Daily sunshine 8.4 hrs
Avg rainfall 92 mm 3.6 ins
Rainy days 12 days
Sea temperature 8.4°C 47.1°F
Humidity 71%
Windspeed 15.1kph 9 mph

On average May is the 6th driest month of the year in Portland with around 92mm 3.6 inches of rain making it a a little 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 8.4 hours of sunshine per day.

May temperatures in Portland

Portland average temperature in May

May rainfall

Portland average rain in May

May hourly sunshine

Portland average rain in May

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 May 2024.

Other monthly averages

Best places to visit in May

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

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