South Portland (ME) Weather and Climate: A Comprehensive Guide
The climate in South Portland is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to very cold in the cooler months.
It is also known for its large amounts of rain/snowfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
In South Portland, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a comfortable 26°C in July to a very cold 0°C in the coolest month, January.
Nights are cooler, with lows often dropping to around -9°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
South Portland experiences significant rain/snowfall throughout the year, averaging 1415 mm of precipitation annually. South Portland offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between June (156 mm) and January (88 mm) is not too significant, making the climate enjoyable for visitors and residents alike.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, South Portland serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.3 hours of sunshine daily, and embrace the darker days in December, offering only 4.7 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year ranges from 3°C in March to 18°C in August.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in South Portland.
The city experiences its highest humidity in September, reaching 77%. In February, the humidity drops to its lowest level at 65%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
clear and no rain partly cloudy and no rain partly cloudy and snowForecast for South Portland (ME)
6 m/s
4 m/s
5 m/s
The best time of year to visit South Portland in the United States of America
During the months of June, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 26°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 0°C.
June tops the wettest month list with 156 mm of rainfall.
January is the driest month with 88 mm of precipitation.
July is the sunniest month with an average of 278 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
