Portland weather averages

Going to Portland? Find the best month to visit Portland based on the weather.

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Check Portland weather averages before you book your next holiday in 2019/2020. Today's maximum temperature in Portland is expected to be 15°C, while the average maximum temperature in May is 18°C.

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More about Portland

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The weather for Portland, Maine shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Portland weather averages: best month

Portland Best month Averages
Warmest July 26°C
Sunniest June & July 9 hours per day
Least rain September 9 days
Warmest sea August 17°C

Portland climate guide

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Tropical storm risk: Portland, Maine hurricane season

% of month affected by tropical storms
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The Portland, Maine tropical storm risk chart above shows the hurricane season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms

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Portland weather averages by month

Check Portland holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare Portland weather with the USA

Below the Portland weather chart shows maximum daytime temperature for Portland, Maine, USA and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

Maximum daytime temperature (°C)

Portland, Maine, USA
USA (Washington)
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Metric (°C / mm)  |  Imperial (°F / inches)

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More Maine destinations

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