March weather forecast
Portland, ME

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

Weather in March

As the month rolls into March, signs of spring finally start to come to the surface. The climate warms up, with temperatures escalating from 28.4°F (-2°C) to 38.3°F (3.5°C). One can anticipate Portland, Maine to witness the charm of spring blossoming slowly but steadily. However, a winter chill remains in the air and winter gear might still be needed. Fresh rainfall aids in washing away the winter blues and reveals the first green of the pending spring season.

Temperature

In March, the meteorological conditions in Portland subtly change with the average high-temperature edging from a wintry 32.5°F (0.3°C) in February to a still cold 38.3°F (3.5°C). Portland, during the nights of March, experiences an average temperature drop to a freezing cold 28.4°F (-2°C).

Humidity

In Portland, the average relative humidity in March is 78%.

Rainfall

In Portland, in March, it is raining for 9.3 days, with typically 1.73" (44mm) of accumulated precipitation. In Portland, during the entire year, the rain falls for 127 days and collects up to 21.93" (557mm) of precipitation.

Snowfall

Months with snowfall in Portland are January through April, October through December. In Portland, Maine, during March, snow falls for 5.8 days and regularly aggregates up to 2.09" (53mm) of snow. In Portland, during the entire year, snow falls for 29.7 days and aggregates up to 11.73" (298mm) of snow.

Ocean temperature

March is the month with the coldest seawater in Portland, with an average ocean temperature of 37.9°F (3.3°C).
Note: In the scenario of swimming, this is assessed as life-threatening and highly risky. The chilling water causes severe discomfort and induces instant hyperventilation. A specialized swimsuit is necessary to counter thermal damage.

Daylight

In Portland, the average length of the day in March is 11h and 58min.
On the first day of March, sunrise is at 6:16 am and sunset at 5:30 pm EST. On the last day of the month, sunrise is at 6:22 am and sunset at 7:07 pm EDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In Portland, the average sunshine in March is 5.9h.

UV index

The months with the lowest UV index in Portland are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: In March, the maximum UV index of 2 suggests these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

How cold does it get in Portland in March?

In Portland, in March, the average high-temperature is 38.3°F (3.5°C), and the average low-temperature is 28.4°F (-2°C).

What is the average humidity in March in Portland?

In March, the average relative humidity in Portland, Maine, is 78%.

How much does it rain in Portland in March?

In Portland, Maine, during March, the rain falls for 9.3 days and regularly aggregates up to 1.73" (44mm) of precipitation.

How much does it snow in Portland in March?

In Portland, in March, during 5.8 snowfall days, 2.09" (53mm) of snow is typically accumulated.

What month is the ocean coldest in Portland?

With an average ocean temperature of 37.9°F (3.3°C), March is the month with the coldest seawater in Portland.

What is the ocean temperature in March in Portland?

In March, the average ocean temperature is 37.9°F (3.3°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the average length of the day in March in Portland?

In Portland, Maine, the average day length in March is 11h and 58min.

When is the sunrise / sunset in March in Portland?

In March, on the first day of the month, sunrise is at 6:16 am and sunset at 5:30 pm EST. On the last day of the month, in Portland, Maine, sunrise is at 6:22 am and sunset at 7:07 pm EDT.

When does Daylight Saving Time (DST) start in March in Portland?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How many hours of sunshine does Portland have in March?

In Portland, Maine, the average sunshine duration in March is 5.9h.

What is the month with the lowest UV index in Portland?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in March in Portland?

In March, the average daily maximum UV index in Portland is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Portland, ME

Average temperature in March - Portland, ME
  • Average high temperature in March: 38.3°F

The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in March: 28.4°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in March
Portland, ME

Average pressure in March - Portland, ME
  • Average pressure in March: 30.02"Hg

The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in March
Portland, ME

Average wind speed in March - Portland, ME
  • Average wind speed in March: 11.7mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).

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Average humidity in March
Portland, ME

Average humidity in March - Portland, ME
  • Average humidity in March: 78%

The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in March
Portland, ME

Average rainfall in March - Portland, ME
  • Average rainfall in March: 1.73"

The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is September (1.18").

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Average rainfall days in March
Portland, ME

Average rainfall days in March - Portland, ME
  • Average rainfall days in March: 9.3 days

The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in March
Portland, ME

Average snowfall in March - Portland, ME
  • Average snowfall in March: 2.09"

The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in March
Portland, ME

Average snowfall days in March - Portland, ME
  • Average snowfall days in March: 5.8 days

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

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Average sea temperature in March
Portland, ME

Average sea temperature in March - Portland, ME
  • Average sea temperature in March: 38°F

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).

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Average daylight in March /
Average sunshine in March
Portland, ME

Average daylight in March / Average sunshine in March - Portland, ME
  • Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in March: 5h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

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Average sunshine days in March
Portland, ME

Average sunshine days in March - Portland, ME
  • Average sunshine days in March: 15.6 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (13.8 days).

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Average UV index in March
Portland, ME

Average UV index in March - Portland, ME
  • Average UV index in March: 2

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in March
Portland, ME

Average cloud cover in March - Portland, ME
  • Average cloud cover in March: 49

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in March
Portland, ME

Average visibility in March - Portland, ME
  • Average visibility in March: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Portland, Maine, USA

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