March weather forecast and climate
New Castle, DE

Weather in March

The first month of the spring, March, is a cool month in New Castle, Delaware, with average temperature ranging between max 50°F (10°C) and min 35.1°F (1.7°C).

Temperature

In New Castle, the average high-temperature slightly increases, from a wintry 41.7°F (5.4°C) in February, to a cool 50°F (10°C). In March, the average low-temperature is 35.1°F (1.7°C).

Humidity

In March, the average relative humidity is 73%.

Rainfall

In New Castle, Delaware, in March, during 12.2 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 143.2 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in New Castle. In New Castle, in March, snow falls for 2.8 days, with typically accumulated 1.61" (41mm) of snow. Throughout the year, in New Castle, there are 15 snowfall days, and 5.47" (139mm) of snow is accumulated.

Ocean temperature

In New Castle, the average seawater temperature in March is 42.3°F (5.7°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in March is 12h.

Sunshine

In New Castle, Delaware, the average sunshine is 6.6h.

UV index

In New Castle, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: In March, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in March in New Castle?

In March, in New Castle, the average high-temperature is 50°F (10°C), and the average low-temperature is 35.1°F (1.7°C).

What is the average humidity in March in New Castle?

In New Castle, the average relative humidity in March is 73%.

How many days does it rain in March in New Castle?

In New Castle, Delaware, in March, it is raining for 12.2 days, with typically 1.77" (45mm) of accumulated precipitation.

How much does it snow in New Castle in March?

In March, it is snowing for 2.8 days. Throughout March, 1.61" (41mm) of snow is accumulated.

What is the ocean temperature in March in New Castle?

In New Castle, in March, the average water temperature is 42.3°F (5.7°C). Swimming in 42.3°F (5.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does New Castle have in March?

In March, the average length of the day is 12h.

How many hours of sunshine does New Castle have in March?

The average sunshine in March in New Castle, Delaware, is 6.6h.

What is the UV index reading in March in New Castle?

In New Castle, the average daily maximum UV index in March is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in March
New Castle, DE

Average temperature in March - New Castle, DE
  • Average high temperature in March: 50°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in March: 35.1°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in March
New Castle, DE

Average pressure in March - New Castle, DE
  • Average pressure in March: 30.07"

The month with the highest atmospheric pressure is November (30.13").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in March
New Castle, DE

Average wind speed in March - New Castle, DE
  • Average wind speed in March: 8.8mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in March
New Castle, DE

Average humidity in March - New Castle, DE
  • Average humidity in March: 73%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in March
New Castle, DE

Average rainfall in March - New Castle, DE
  • Average rainfall in March: 1.77"

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is January (1.38").

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Average rainfall days in March
New Castle, DE

Average rainfall days in March - New Castle, DE
  • Average rainfall days in March: 12.2 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in March
New Castle, DE

Average snowfall in March - New Castle, DE
  • Average snowfall in March: 1.61"

The month with the highest snowfall is January (1.69").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in March
New Castle, DE

Average snowfall days in March - New Castle, DE
  • Average snowfall days in March: 2.8 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in March
New Castle, DE

Average sea temperature in March - New Castle, DE
  • Average sea temperature in March: 42.2°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

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Average daylight in March /
Average sunshine in March
New Castle, DE

Average daylight in March / Average sunshine in March - New Castle, DE
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in March: 6.6h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in March
New Castle, DE

Average sunshine days in March - New Castle, DE
  • Average sunshine days in March: 16.2 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in March
New Castle, DE

Average UV index in March - New Castle, DE
  • Average UV index in March: 3

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in March
New Castle, DE

Average cloud cover in March - New Castle, DE
  • Average cloud cover in March: 46

Months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in March
New Castle, DE

Average visibility in March - New Castle, DE
  • Average visibility in March: 6mi

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

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