March weather - Spring 2024

Weather in March
Frequently asked questions
Average temperature in March
Average pressure in March
Average wind speed in March
Average humidity in March
Average rainfall in March
Average rainfall days in March
Average snowfall in March
Average snowfall days in March
Average sea temperature in March
Average daylight in March
Average sunshine in March
Average sunshine days in March
Average UV index in March
Average cloud cover in March
Average visibility in March

Bright neon lights and buildings next to the very calm waters of the iconic Piscataqua River in Portsmouth, New Hampshire

Weather in March

As winter melancholy fades, the promise of spring sunshine beckons in March. Portsmouth ventures towards warmer days with increased sunshine hours, hinting at the approaching spring respite. Relative humidity remains consistent, juxtaposing the partly cloudy skies with brief bursts of watery sunshine. Snowfall decreases sharply, with only 2.68" (68mm) distributed over roughly seven days. The average daily wind speed starts to dwindle, manifesting the city's slow saunter towards spring.

Temperature

Portsmouth's transition into March brings a slight rise in the average high-temperature, moving from 34.2°F (1.2°C) in February to a still cold 40.5°F (4.7°C). During March nights, Portsmouth records an average temperature of 28.8°F (-1.8°C).

Humidity

The average relative humidity in March is 78%.

Rainfall

In Portsmouth, during March, the rain falls for 11.8 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, there are 144.2 rainfall days, and 27.48" (698mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Portsmouth, in March, snow falls for 6.8 days, with typically accumulated 2.68" (68mm) of snow. Throughout the year, there are 35.2 snowfall days, and 16.97" (431mm) of snow is accumulated.

Ocean temperature

With an average ocean temperature of 38.5°F (3.6°C), March is the month with the coldest seawater.
Note: In swimming exercises, this state is seen as life-threatening and poses serious dangers. The painful sensation of the cold water induces immediate hyperventilation. A specialized swimsuit is required to limit thermal damage.

Daylight

In Portsmouth, the average length of the day in March is 11h and 58min.
On the first day of the month, sunrise is at 6:17 am and sunset at 5:32 pm EST. On the last day of March, sunrise is at 6:25 am and sunset at 7:08 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

The average sunshine in March is 5.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 during March translates into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.

Updated: Jun 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is March?

Portsmouth in March has an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 28.8°F (-1.8°C).

What is the average humidity in March?

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

How much does it rain in March?

In Portsmouth, New Hampshire, in March, during 11.8 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

How many days does it snow in March?

In Portsmouth, New Hampshire, in March, during 6.8 snowfall days, 2.68" (68mm) of snow is typically accumulated.

What month is the ocean coldest?

March is the month with the coldest seawater, with an average ocean temperature of 38.5°F (3.6°C).

What is the ocean temperature in March?

In Portsmouth, the average seawater temperature in March is 38.5°F (3.6°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

How many hours of daylight does Portsmouth have in March?

The average day length in March in Portsmouth is 11h and 58min.

What time are sunrise and sunset in March?

In March, on the first day of the month, sunrise is at 6:17 am and sunset at 5:32 pm EST. On the last day of the month, sunrise is at 6:25 am and sunset at 7:08 pm EDT.

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

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 Portsmouth have in March?

In March, the average sunshine duration is 5.8h.

When is the lowest UV index?

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

What is the UV index reading in March?

In March, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F March A M J J A S O N D

Feb

March

Apr

Average high temperature

34.2°F 1.2°C

40.5°F 4.7°C

51.1°F 10.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.9mph 19.2km/h

11.4mph 18.3km/h

10.3mph 16.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

6.8

1.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

14.1

13.9

13.2

Average UV index

Average cloud cover

Average visibility

Average temperature in March
Portsmouth, NH

Average high temperature in March: 40.5°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.8°F).

Average low temperature in March: 28.8°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in March
Portsmouth, NH

Average pressure in March: 30.02"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in March
Portsmouth, NH

Average wind speed in March: 10.7mph

The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in March
Portsmouth, NH

Average humidity in March: 78%

The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are April and November (75%).

Average rainfall in March
Portsmouth, NH

Average rainfall in March: 2.4"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in March
Portsmouth, NH

Average rainfall days in March: 11.8 days

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (7.5 days).

Average snowfall in March
Portsmouth, NH

Average snowfall in March: 2.68"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in March
Portsmouth, NH

Average snowfall days in March: 6.8 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in March
Portsmouth, NH

Average sea temperature in March: 38.5°F

The best month for swimming (with the highest average sea temperature) is August (65.6°F).
The coldest month (with the lowest average sea temperature) is March (38.5°F).

Average daylight in March /
Average sunshine in March
Portsmouth, NH

Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

Average sunshine in March: 5h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days in March
Portsmouth, NH

Average sunshine days in March: 13.9 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in March
Portsmouth, NH

Average UV index in March: 2

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in March
Portsmouth, NH

Average cloud cover in March: 50

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in March
Portsmouth, NH

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).

March weather forecast
Portsmouth, NH

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