April weather forecast and climate
South River, NJ

Weather in April

April in South River, New Jersey, is a moderate spring month, with temperature in the range of an average high of 59°F (15°C) and an average low of 44.2°F (6.8°C).

Temperature

In April, the average high-temperature rises, from a frosty 47.3°F (8.5°C) in March, to a mild 59°F (15°C). In South River, in April, the average low-temperature is 44.2°F (6.8°C).

Humidity

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

Rainfall

In South River, in April, during 14.3 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. In South River, during the entire year, the rain falls for 154 days and collects up to 30.75" (781mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in South River. April is the last month it regularly snows. During 0.2 snowfall days, South River aggregates 0.12" (3mm) of snow. Throughout the year, there are 18.1 snowfall days, and 8.35" (212mm) of snow is accumulated.

Daylight

In South River, New Jersey, the average length of the day is 13.3h.

Sunshine

In South River, the average sunshine in April is 8.4h.

UV index

In South River, New Jersey, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In April, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 temperature in April in South River?

The average high-temperature, in April, in South River, New Jersey, is 59°F (15°C), while the average low-temperature is 44.2°F (6.8°C).

What is the least humid month in South River?

April and August, with an average relative humidity of 73%, are the least humid months in South River.

What is the average humidity in April in South River?

In South River, the average relative humidity in April is 73%.

How much does it rain in South River in April?

In April, in South River, the rain falls for 14.3 days. Throughout April, 2.36" (60mm) of precipitation is accumulated.

What is the last month it snows in South River?

April is the last month it regularly snows. During 0.2 snowfall days, in April, South River aggregates 0.12" (3mm) of snow.

What is the average length of the day in April in South River?

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

How long on average sun shines in April in South River?

In April, the average sunshine in South River, New Jersey, is 8.4h.

How high is the UV index in April in South River?

In South River, New Jersey, the average daily maximum UV index in April is 4. 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
South River, NJ

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

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in April: 44.2°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in April
South River, NJ

Average pressure in April - South River, 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
South River, NJ

Average wind speed in April - South River, NJ
  • Average wind speed in April: 9.1mph

The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in April
South River, NJ

Average humidity in April - South River, NJ
  • Average humidity in April: 73%

Months with the highest relative humidity are February, May, October and December (77%).
Months with the lowest relative humidity are April and August (73%).

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Average rainfall in April
South River, NJ

Average rainfall in April - South River, NJ
  • Average rainfall in April: 2.36"

The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in April
South River, NJ

Average rainfall days in April - South River, NJ
  • Average rainfall days in April: 14.3 days

The month with the highest number of rainy days is July (17.4 days).
Months with the least rainy days are January and November (8.5 days).

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Average snowfall in April
South River, NJ

Average snowfall in April - South River, NJ
  • Average snowfall in April: 0.12"

The month with the highest snowfall is March (3.82").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in April
South River, NJ

Average snowfall days in April - South River, NJ
  • Average snowfall days in April: 0.2 days

The month with the highest number of snowfall days is February (5.1 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
South River, NJ

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

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in April: 8.4h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in April
South River, NJ

Average sunshine days in April - South River, NJ
  • Average sunshine days in April: 14.1 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.5 days).

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Average UV index in April
South River, NJ

Average UV index in April - South River, NJ
  • Average UV index in April: 4

Months with the highest UV index are May, June, July and August (UV index 6).
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
South River, NJ

Average cloud cover in April - South River, NJ
  • Average cloud cover in April: 45

Months with the most cloud cover are February and December (Cloud cover 48).
Months with the least cloud cover are July and August (Cloud cover 31).

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Average visibility in April
South River, NJ

Average visibility in April - South River, NJ
  • Average visibility in April: 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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