May weather forecast
South River, NJ

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Weather in May

The last month of the spring, May, is a pleasant month in South River, New Jersey, with an average temperature ranging between min 53.8°F (12.1°C) and max 68.9°F (20.5°C).

Temperature

With the onset of May, South River's weather sees a temperature rise, transitioning from a mild 59°F (15°C) in April to a pleasant 68.9°F (20.5°C). During the month of May, the nighttime temperature in South River falls to an average of 53.8°F (12.1°C).

Humidity

The months with the highest humidity are February, May, October and December, with an average relative humidity of 77%.

Rainfall

In South River, during May, the rain falls for 16.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. In South River, during the entire year, the rain falls for 154 days and collects up to 30.75" (781mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In May, the average length of the day is 14h and 26min.
On the first day of May in South River, sunrise is at 5:55 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:21 pm EDT.

Sunshine

In May, the average sunshine in South River is 8.6h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in South River, New Jersey. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in May translates into this advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What is the temperature in May in South River?

The high-temperature, in May, in South River, is 68.9°F (20.5°C), while the low-temperature averages to 53.8°F (12.1°C).

What are the most humid months in South River?

The months with the highest humidity in South River are February, May, October and December, with an average relative humidity of 77%.

What is the average humidity in May in South River?

In May, the average relative humidity in South River, New Jersey, is 77%.

How many days does it rain in May in South River?

In South River, in May, during 16.2 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

When it does not snow in South River?

In South River, snow does not fall in May through October.

Does it snow in South River in May?

In May, in South River, New Jersey, it doesn't snow. April is the latest month when it typically snows.

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

In South River, the average day length in May is 14h and 26min.

When are sunrise and sunset in May in South River?

In May, on the first day of the month, sunrise is at 5:55 am and sunset at 7:53 pm. On the last day of the month, in South River, sunrise is at 5:29 am and sunset at 8:21 pm EDT.

How many hours of sunshine does South River have in May?

In May, the average sunshine duration in South River is 8.6h.

What are the months with the highest UV index in South River?

May through August, with an average maximum UV index of 6, are months with the highest UV index in South River, New Jersey.

What is the UV index reading in May in South River?

In South River, New Jersey, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
South River, NJ

Average temperature in May - South River, NJ
  • Average high temperature in May: 68.9°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 May: 53.8°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 May
South River, NJ

Average pressure in May - South River, NJ
  • Average pressure in May: 30.01"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 May
South River, NJ

Average wind speed in May - South River, NJ
  • Average wind speed in May: 7.5mph

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 May
South River, NJ

Average humidity in May - South River, NJ
  • Average humidity in May: 77%

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

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Average rainfall in May
South River, NJ

Average rainfall in May - South River, NJ
  • Average rainfall in May: 2.95"

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 May
South River, NJ

Average rainfall days in May - South River, NJ
  • Average rainfall days in May: 16.2 days

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

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Average snowfall in May
South River, NJ

Average snowfall in May - South River, NJ
  • Average snowfall in May: 0"

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

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Average snowfall days in May
South River, NJ

Average snowfall days in May - South River, NJ
  • Average snowfall days in May: 0 days

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

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

Average daylight in May / Average sunshine in May - South River, NJ
  • Average daylight in May: 14h 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 May: 8h and 4min

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 42min).

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Average sunshine days in May
South River, NJ

Average sunshine days in May - South River, NJ
  • Average sunshine days in May: 12.3 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 May
South River, NJ

Average UV index in May - South River, NJ
  • Average UV index in May: 6

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, March, November and December (UV index 2).

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Average cloud cover in May
South River, NJ

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

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

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Average visibility in May
South River, NJ

Average visibility in May - South River, NJ
  • Average visibility in May: 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).

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South River, New Jersey, USA

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