May weather forecast
South Plainfield, NJ

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Weather in May

The last month of the spring, May, is an agreeable month in South Plainfield, New Jersey, with an average temperature varying between 69.3°F (20.7°C) and 52.9°F (11.6°C).

Temperature

May indicates a change in the average high-temperature, moving up from a refreshing 59°F (15°C) in April to a pleasant 69.3°F (20.7°C). Throughout May, the temperature falls to an average low of 52.9°F (11.6°C).

Humidity

In May, the average relative humidity in South Plainfield is 77%.

Rainfall

In May, in South Plainfield, the rain falls for 16.3 days. Throughout May, 2.8" (71mm) of precipitation is accumulated. In South Plainfield, 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. May is the last month it regularly snows in South Plainfield. During 0.1 snowfall days, in May, South Plainfield aggregates 0.24" (6mm) of snow. In South Plainfield, during the entire year, snow falls for 25.4 days and aggregates up to 10.31" (262mm) of snow.

Daylight

In South Plainfield, New Jersey, the average length of the day in May is 14h and 28min.
On the first day of May, 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 Plainfield is 8.6h.

UV index

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are May temperatures in South Plainfield?

The high-temperature in South Plainfield during May is 69.3°F (20.7°C) and the low-temperature is 52.9°F (11.6°C).

What is the average humidity in May in South Plainfield?

In South Plainfield, the average relative humidity in May is 77%.

How much does it rain in South Plainfield in May?

In South Plainfield, in May, during 16.3 rainfall days, 2.8" (71mm) of precipitation is typically accumulated.

What is the last month it snows in South Plainfield?

May is the last month it regularly snows. During 0.1 snowfall days, in May, South Plainfield aggregates 0.24" (6mm) of snow.

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

In May, the average day length in South Plainfield is 14h and 28min.

When is the sunrise / sunset in May in South Plainfield?

On the first day of May in South Plainfield, 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.

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

In South Plainfield, New Jersey, the average sunshine duration in May is 8.6h.

What is the UV index intensity in May in South Plainfield?

The average daily maximum UV index in May in South Plainfield is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
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 Plainfield, NJ

Average temperature in May - South Plainfield, NJ
  • Average high temperature in May: 69.3°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 May: 52.9°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).

Average pressure in May
South Plainfield, NJ

Average pressure in May - South Plainfield, 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).

Average wind speed in May
South Plainfield, NJ

Average wind speed in May - South Plainfield, NJ
  • Average wind speed in May: 7mph

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).

Average humidity in May
South Plainfield, NJ

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

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%).

Average rainfall in May
South Plainfield, NJ

Average rainfall in May - South Plainfield, NJ
  • Average rainfall in May: 2.8"

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

Average rainfall days in May
South Plainfield, NJ

Average rainfall days in May - South Plainfield, NJ
  • Average rainfall days in May: 16.3 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).

Average snowfall in May
South Plainfield, NJ

Average snowfall in May - South Plainfield, NJ
  • Average snowfall in May: 0.24"

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

Average snowfall days in May
South Plainfield, NJ

Average snowfall days in May - South Plainfield, NJ
  • Average snowfall days in May: 0.1 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).

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

Average daylight in May / Average sunshine in May - South Plainfield, NJ
  • Average daylight in May: 14h and 3min

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 36min).

Average sunshine days in May
South Plainfield, NJ

Average sunshine days in May - South Plainfield, NJ
  • Average sunshine days in May: 12.6 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).

Average UV index in May
South Plainfield, NJ

Average UV index in May - South Plainfield, NJ
  • Average UV index in May: 5

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).

Average cloud cover in May
South Plainfield, NJ

Average cloud cover in May - South Plainfield, NJ
  • Average cloud cover in May: 46

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).

Average visibility in May
South Plainfield, NJ

Average visibility in May - South Plainfield, NJ
  • Average visibility in May: 5mi

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).

South Plainfield, New Jersey, USA

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