Monthly weather forecast and climate
Portland, ME

Dusk view of the lit skyscrapers of the Portland city in Maine,
Dusk view of the lit skyscrapers of the Portland city in Maine,

What is the coldest month in Portland?

The coldest month is January, with an average high-temperature of 31.3°F (-0.4°C) and an average low-temperature of 13.5°F (-10.3°C).

How many days does it rain in Portland?

Throughout the year, in Portland, Maine, there are 130.9 rainfall days, and 47.3" (1200.3mm) of precipitation is accumulated.

When does it snow in Portland?

Months with snowfall in Portland are January through April, November and December.

How much does it snow in Portland?

In Portland, Maine, during the entire year, snow falls for 27.7 days, and aggregates up to 61.9" (1572.3mm) of snow.

When does it snow the most in Portland?

January is the month with the most snowfall in Portland. Snow falls for 7.9 days and accumulates 19.2" (487.7mm) of snow.

What is the warmest month in Portland?

The warmest month in Portland, Maine, is July, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 59.4°F (15.2°C).

What is the driest month in Portland?

The month with the least rainfall in Portland is August when the rain falls for 9.3 days and typically collects 3.1" (79.8mm) of precipitation.

What is the wettest month in Portland?

November is the month with the most rainfall. Rain falls for 11.2 days and accumulates 4.9" (125.2mm) of precipitation.
Average temperature - Portland, ME
Average humidity - Portland, ME

The month with the highest relative humidity is September (76.7%).
The month with the lowest relative humidity is February (65.2%).

Average rainfall - Portland, ME
Average rainfall days - Portland, ME

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is September (9.2 days).

Average snowfall - Portland, ME
Average snowfall days - Portland, ME

The month with the highest number of snowfall days is January (7.9 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature - Portland, ME

The best month for swimming (with the highest average sea temperature) is August (63.7°F).
The coldest month (with the lowest average sea temperature) is March (38°F).

Average daylight / Average sunshine - Portland, ME
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