March weather forecast
New Castle, NH

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Weather in March

With a rise to 40.5°F (4.7°C), March offers slightly warmer weather compared to the preceding months. Both snowfall and snowy days see a considerable decrease, indicating the onset of spring. Still, the lingering chill of winter makes the sea temperature too low for a comfortable swim. Sunlight hours increase perceptibly as the days get longer, bringing a welcome respite from the gloominess. Despite the melt, the snow does not seem to have a significant effect on the humidity levels, which remain rather consistent.

Temperature

The beginning of March signals a minor rise in the average high-temperature, moving from an icy 34.2°F (1.2°C) in February to a still wintry 40.5°F (4.7°C). New Castle observes an average nighttime low-temperature of 28.8°F (-1.8°C) during the month of March.

Humidity

The average relative humidity in March is 78%.

Rainfall

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

Snowfall

Months with snowfall are January through April, October through December. In New Castle, in March, snow falls for 6.8 days, with typically accumulated 2.68" (68mm) of snow. In New Castle, during the entire year, snow falls for 35.2 days and aggregates up to 16.97" (431mm) of snow.

Ocean temperature

The month with the coldest seawater is March, with an average ocean temperature of 38.5°F (3.6°C).
Note: In the activity of swimming, this state poses an instant danger to life. Breathing control is completely lost, impeding any form of clear thinking. Employing a specialized swimsuit is crucial to minimize thermal loss.

Daylight

In New Castle, the average length of the day in March is 11h and 58min.
On the first day of March, 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.
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 March, the average sunshine 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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 2 during March morphs into the following directions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during March?

The high-temperature, in March, in New Castle, is 40.5°F (4.7°C), while the low-temperature averages to 28.8°F (-1.8°C).

What is the average humidity in March?

The average relative humidity in March is 78%.

How much does it rain in March?

In New Castle, in March, it is raining for 11.8 days, with typically 2.4" (61mm) of accumulated precipitation.

How many days does it snow in March?

In March, it is snowing for 6.8 days. Throughout March, 2.68" (68mm) of snow is accumulated.

What is the month with the coldest ocean?

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 New Castle, in March, the average water temperature is 38.5°F (3.6°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 March, the average day length is 11h and 58min.

When is the sunrise / sunset in March in New Castle?

On the first day of March in New Castle, 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 in New Castle?

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 long on average sun shines in March?

In March, the average sunshine duration is 5.8h.

What are the months with the lowest UV index?

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

How high is the UV index in March?

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

Average temperature in March - New Castle, 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
New Castle, NH

Average pressure in March - New Castle, 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
New Castle, NH

Average wind speed in March - New Castle, 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
New Castle, NH

Average humidity in March - New Castle, 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
New Castle, NH

Average rainfall in March - New Castle, 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
New Castle, NH

Average rainfall days in March - New Castle, 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
New Castle, NH

Average snowfall in March - New Castle, 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
New Castle, NH

Average snowfall days in March - New Castle, 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
New Castle, NH

Average sea temperature in March - New Castle, 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
New Castle, NH

Average daylight in March / Average sunshine in March - New Castle, 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
New Castle, NH

Average sunshine days in March - New Castle, 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
New Castle, NH

Average UV index in March - New Castle, 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
New Castle, NH

Average cloud cover in March - New Castle, 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
New Castle, NH

Average visibility in March - New Castle, 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).

New Castle, New Hampshire, USA

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