April weather forecast
Mountainside, NJ

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Weather in April

April is a refreshing spring month in Mountainside, New Jersey, with an average temperature fluctuating between 43.3°F (6.3°C) and 59°F (15°C).

Temperature

The arrival of April brings a temperature shift, with the average high-temperature escalating from a chilly 47.3°F (8.5°C) in March to a refreshing 59°F (15°C). During the month of April, the nighttime temperature falls to an average of 43.3°F (6.3°C).

Humidity

The months with the lowest humidity are April and August, with an average relative humidity of 73%.

Rainfall

In Mountainside, in April, it is raining for 15.4 days, with typically 2.36" (60mm) of accumulated precipitation. In Mountainside, during the entire year, the rain falls for 160.7 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Mountainside, in April, snow falls for 0.6 days, with typically accumulated 0.2" (5mm) of snow. Throughout the year, there are 25.4 snowfall days, and 10.31" (262mm) of snow is accumulated.

Daylight

In April, the average length of the day in Mountainside is 13h and 19min.
On the first day of April, sunrise is at 6:39 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 7:52 pm EDT.

Sunshine

In April, the average sunshine in Mountainside is 8.2h.

UV index

In April, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 4 during April translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
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Frequently asked questions

What are the temperatures in Mountainside in April?

The high-temperature, in April, in Mountainside, is 59°F (15°C), while the low-temperature averages to 43.3°F (6.3°C).

What are the least humid months in Mountainside?

The months with the lowest humidity are April and August, with an average relative humidity of 73%.

What is the average humidity in April in Mountainside?

In Mountainside, New Jersey, the average relative humidity in April is 73%.

How many days does it rain in April in Mountainside?

In April, in Mountainside, New Jersey, the rain falls for 15.4 days. Throughout April, 2.36" (60mm) of precipitation is accumulated.

How much does it snow in Mountainside in April?

In Mountainside, in April, snow falls for 0.6 days, with typically accumulated 0.2" (5mm) of snow.

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

In April, the average day length in Mountainside, New Jersey, is 13h and 19min.

When is the sunrise / sunset in April in Mountainside?

On the first day of April in Mountainside, New Jersey, sunrise is at 6:39 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 7:52 pm EDT.

How many hours of sunshine does Mountainside have in April?

In April, the average sunshine duration is 8.2h.

How high is the UV index in April in Mountainside?

In Mountainside, the average daily maximum UV index in April is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
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 April
Mountainside, NJ

Average temperature in April - Mountainside, NJ
  • Average high temperature in April: 59°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in April: 43.3°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

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Average pressure in April
Mountainside, NJ

Average pressure in April - Mountainside, NJ
  • Average pressure in April: 29.98"Hg

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

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Average wind speed in April
Mountainside, NJ

Average wind speed in April - Mountainside, NJ
  • Average wind speed in April: 8.5mph

The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in April
Mountainside, NJ

Average humidity in April - Mountainside, NJ
  • Average humidity in April: 73%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and August (73%).

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Average rainfall in April
Mountainside, NJ

Average rainfall in April - Mountainside, NJ
  • Average rainfall in April: 2.36"

The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in April
Mountainside, NJ

Average rainfall days in April - Mountainside, NJ
  • Average rainfall days in April: 15.4 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.5 days).

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Average snowfall in April
Mountainside, NJ

Average snowfall in April - Mountainside, NJ
  • Average snowfall in April: 0.2"

The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Mountainside, NJ

Average snowfall days in April - Mountainside, NJ
  • Average snowfall days in April: 0.6 days

The months with the highest number of snowfall days are January and February (7.3 days).
The 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
Mountainside, NJ

Average daylight in April / Average sunshine in April - Mountainside, NJ
  • Average daylight in April: 13h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in April: 8h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in April
Mountainside, NJ

Average sunshine days in April - Mountainside, NJ
  • Average sunshine days in April: 12.4 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).

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Average UV index in April
Mountainside, NJ

Average UV index in April - Mountainside, NJ
  • Average UV index in April: 4

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

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Average cloud cover in April
Mountainside, NJ

Average cloud cover in April - Mountainside, NJ
  • Average cloud cover in April: 45

The months with the most cloud cover are February, March and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in April
Mountainside, NJ

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

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

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Mountainside, New Jersey, USA

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