Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The arrival of April in New Castle brings a temperature shift, with the average high-temperature escalating from a cool 50°F (10°C) in March to a refreshing 61.7°F (16.5°C). New Castle's temperature drops to an average low of 45.1°F (7.3°C) during the nights of April.Humidity
The least humid month in New Castle is April, with an average relative humidity of 72%.Rainfall
In New Castle, Delaware, in April, it is raining for 13.7 days, with typically 1.69" (43mm) of accumulated precipitation. In New Castle, during the entire year, the rain falls for 143.2 days and collects up to 21.89" (556mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.3 snowfall days, in April, New Castle aggregates 0.16" (4mm) 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 April is 47.7°F (8.7°C).Note: While a brief time in 47.7°F (8.7°C) at 55.4°F (13°C) is already bracing, plunging below 50°F (10°C) can severely affect breathing and introduce a cold shock, relying on your physical state.
Daylight
The average length of the day in April is 13h and 17min.On the first day of April, sunrise is at 6:45 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 7:55 pm EDT.
Sunshine
In April, the average sunshine is 8.6h.UV index
In New Castle, Delaware, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 4 in April translates into these instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What are the temperatures in New Castle in April?
What is the least humid month in New Castle?
What is the average humidity in April in New Castle?
How many days does it rain in April in New Castle?
What is the last month it snows in New Castle?
What is the water temperature in April in New Castle?
How many hours of daylight does New Castle have in April?
When is the sunrise / sunset in April in New Castle?
How long on average sun shines in April in New Castle?
What is the UV index reading in April in New Castle?
Average temperature in April
New Castle, DE
- Average high temperature in April: 61.7°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 April: 45.1°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 April
New Castle, DE
- Average pressure in April: 29.99"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 April
New Castle, DE
- Average wind speed in April: 8.7mph
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 April
New Castle, DE
- Average humidity in April: 72%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in April
New Castle, DE
- Average rainfall in April: 1.69"
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 April
New Castle, DE
- Average rainfall days in April: 13.7 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 April
New Castle, DE
- Average snowfall in April: 0.16"
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 April
New Castle, DE
- Average snowfall days in April: 0.3 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 April
New Castle, DE
- Average sea temperature in April: 47.6°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 April /
Average sunshine in April
New Castle, DE
- Average daylight in April: 13h and 2min
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 April: 8h 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 April
New Castle, DE
- Average sunshine days in April: 14.4 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 April
New Castle, DE
- Average UV index in April: 4
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 April
New Castle, DE
- Average cloud cover in April: 42
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 April
New Castle, DE
- Average visibility in April: 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, Delaware, USA
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