April weather forecast and climate
Delaware, NJ

Weather in April

April is a mild spring month in Delaware, New Jersey, with average temperature fluctuating between 56.1°F (13.4°C) and 38.5°F (3.6°C).

Temperature

In Delaware, New Jersey, the average high-temperature in April increases, from a frosty 44.1°F (6.7°C) in March, to a mild 56.1°F (13.4°C). In Delaware, the average low-temperature is 38.5°F (3.6°C).

Humidity

With an average relative humidity of 76%, April is the least humid month.

Rainfall

In Delaware, New Jersey,, during 16.8 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. Throughout the year, there are 165.9 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In April, in Delaware, it is snowing for 1.9 days. Throughout April, 0.39" (10mm) of snow is accumulated. In Delaware, during the entire year, snow falls for 42.7 days, and aggregates up to 21.26" (540mm) of snow.

Daylight

In Delaware, the average length of the day in April is 13.3h.

Sunshine

In April, the average sunshine is 7.9h.

UV index

The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Delaware?

The least humid month in Delaware is April, with an average relative humidity of 76%.

What is the average humidity in April in Delaware?

In Delaware, New Jersey, the average relative humidity in April is 76%.

How many days does it rain in April in Delaware?

In Delaware, during April, the rain falls for 16.8 days and regularly aggregates up to 2.99" (76mm) of precipitation.

How much does it snow in Delaware in April?

In Delaware, in April, snow falls for 1.9 days, with typically accumulated 0.39" (10mm) of snow.

What is the average length of the day in April in Delaware?

In April, the average length of the day is 13.3h.

How long on average sun shines in April in Delaware?

The average sunshine in April is 7.9h.

What is the UV index intensity in April in Delaware?

In Delaware, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in April
Delaware, NJ

Average temperature in April - Delaware, NJ
  • Average high temperature in April: 56.1°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in April: 38.5°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in April
Delaware, NJ

Average pressure in April - Delaware, NJ
  • Average pressure in April: 29.98"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in April
Delaware, NJ

Average wind speed in April - Delaware, NJ
  • Average wind speed in April: 7.5mph

The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in April
Delaware, NJ

Average humidity in April - Delaware, NJ
  • Average humidity in April: 76%

Months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in April
Delaware, NJ

Average rainfall in April - Delaware, NJ
  • Average rainfall in April: 2.99"

The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in April
Delaware, NJ

Average rainfall days in April - Delaware, NJ
  • Average rainfall days in April: 16.8 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in April
Delaware, NJ

Average snowfall in April - Delaware, NJ
  • Average snowfall in April: 0.39"

The month with the highest snowfall is February (5.67").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Delaware, NJ

Average snowfall days in April - Delaware, NJ
  • Average snowfall days in April: 1.9 days

The month with the highest number of snowfall days is January (11.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Delaware, NJ

Average daylight in April / Average sunshine in April - Delaware, NJ
  • Average daylight in April: 13.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in April: 7.9h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.3h).

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Average sunshine days in April
Delaware, NJ

Average sunshine days in April - Delaware, NJ
  • Average sunshine days in April: 11.3 days

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index in April
Delaware, NJ

Average UV index in April - Delaware, NJ
  • Average UV index in April: 3

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in April
Delaware, NJ

Average cloud cover in April - Delaware, NJ
  • Average cloud cover in April: 49

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 35).

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Average visibility in April
Delaware, NJ

Average visibility in April - Delaware, NJ
  • Average visibility in April: 6mi

The month with the highest visibility is April (6mi).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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