March weather forecast
New Castle, DE

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March

Weather in March

March sees a gradual change in weather in New Castle, with both temperatures and rainfall witnessing a rise. A significant increase is observed in the average low temperature, which jumps from 28.4°F (-2°C) in February to 35.1°F (1.7°C) in this month. As spring blossoms, rainfall days also increase, turning the city a vibrant green. The duration of daylight extends further, giving residents more outdoor time. Increased humidity levels lay the groundwork for April's rains.

Temperature

In New Castle, the average high-temperature in March slightly rises, from a cold 41.7°F (5.4°C) in February, to a fresh 50°F (10°C). March generally records an average low-temperature of 35.1°F (1.7°C).

Humidity

The average relative humidity in March is 73%.

Rainfall

In New Castle, during March, the rain falls for 12.2 days and regularly aggregates up to 1.77" (45mm) of precipitation. 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 March, during 2.8 snowfall days, 1.61" (41mm) of snow is typically accumulated. In New Castle, Delaware, during the entire year, snow falls for 15 days and aggregates up to 5.47" (139mm) of snow.

Ocean temperature

In New Castle, in March, the average water temperature is 42.3°F (5.7°C).
Note: Dipping in 42.3°F (5.7°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.

Daylight

In New Castle, the average length of the day in March is 11h and 59min.
On the first day of March, sunrise is at 6:34 am and sunset at 5:54 pm EST. On the last day of the month, sunrise is at 6:46 am and sunset at 7:25 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 New Castle, the average sunshine in March is 6.6h.

UV index

In March, the average daily maximum UV index in New Castle is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In March, the average maximum UV index of 3 translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Jul 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are March temperatures?
The high-temperature, in March, in New Castle, is 50°F (10°C), while the low-temperature averages to 35.1°F (1.7°C).
What is the average humidity in March?
In March, the average relative humidity is 73%.
How much does it rain in March?
In New Castle, in March, it is raining for 12.2 days, with typically 1.77" (45mm) of accumulated precipitation.
How much does it snow in March?
In New Castle, in March, during 2.8 snowfall days, 1.61" (41mm) of snow is typically accumulated.
How cold is the water 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.
What is the average length of the day in March?
In New Castle, Delaware, the average day length in March is 11h and 59min.
When are sunrise and sunset in March?
In March, on the first day of the month, sunrise is at 6:34 am and sunset at 5:54 pm EST. On the last day of the month, sunrise is at 6:46 am and sunset at 7:25 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 New Castle have in March?
The average sunshine duration in March is 6.6h.
What is the UV index reading in March?
In New Castle, the average daily maximum UV index in March is 3. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMarchAMJJASOND
Feb
March
Apr
Average high temperature
41.7°F
50°F
61.7°F
Average low temperature
28.4°F
35.1°F
45.1°F
Average pressure
30.06"Hg
30.07"Hg
29.99"Hg
Average wind speed
8.8mph
8.8mph
8.7mph
Average max. wind speed
9.4mph
9.4mph
9.4mph
Average wind speed gusts
13.9mph
13.4mph
13.2mph
Average humidity
77%
73%
72%
Average rainfall
1.46"
1.77"
1.69"
Average rainfall days
9
12.2
13.7
Average snowfall
1.3"
1.61"
0.16"
Average snowfall days
3.9
2.8
0.3
Average sea temperature
40.9°F
42.2°F
47.6°F
Average daylight
10h 4min
12h 0min
13h 2min
Average sunshine
4h 5min
6h 4min
8h 4min
Average sunshine days
16.1
16.2
14.4
Average UV index
2
3
4
Average cloud cover
46%
46%
42%
Average visibility
6mi
6mi
6mi
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).

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

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

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).

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%).

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").

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).

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").
The months with the least snowfall are May, June, July, August, September and October (0").

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).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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).

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 and 0min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in March: 6h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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).

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

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

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

The 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).

Average visibility in March - New Castle, DE
Average visibility in March
New Castle, DE
  • 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).

°Celsius°Fahrenheit
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