Monthly Temperature Averages and Climate for Portland, ME

Adventure graphic for climate page specific to each city and state

Portland, ME has a longitude of -70.3 degrees and a latitude of 43.7 degrees.

Portland, ME has temperatures that can go as high as 73.5 °F in June, 78.8 °F in July, and 78.8 °F in August. The hottest month is typically July.

Portland, ME also has temperatures that can go as low as 21.1 °F in December, 14.2 °F in January, and 16.0 °F in February. The coldest month is typically January.

The wettest month for Portland, ME is October with 15.0 inches of rain.

The annual weather and monthly temperature averages for highs and lows are presented in the table below. The weather values used to interpolate these values are provided by the US NAOO weather station values from the last 10 years.

Average High (°F)32.033.842.853.664.573.578.878.869.859.048.237.3
Average Low (°F)
Average Precipitation (in)
Tree Graphic for climate page specific to city and state for annual weather site

Maine has a humid continental climate, with warm and sometimes humid summers, and long, cold and very snowy winters. Winters are especially severe in the Northern and Western parts of Maine, while coastal areas are moderated slightly by the Atlantic Ocean, resulting in marginally milder winters and cooler summers than inland regions.

Maine has fewer days of thunderstorms than any other state east of the Rockies, with most of the state averaging fewer than twenty days of thunderstorms a year.

In reality, each climate is unique and finding one that is suitable can be a real challenge! We hope that the information here can be the starting point of your weather and climate research for your next vacation or potentially next home.

We hope you use this information to make your travel plans to Portland, ME or decide if living in the Portland climate is the right choice for you!

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