May weather forecast
Plainfield, NJ

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Weather in May

May ushers in the peak of spring, with temperatures remaining steady from 69.3°F (20.7°C) to 52.9°F (11.6°C). An interesting highlight is at this time weather experiences the peak in rainfall activity, which measures at about 2.8" (71mm). This is also the time when days get longer and nights shorter, leading to increased outdoor activities. May is characterized by a vibe of regrowth and rejuvenity, the weather patterns facilitating an abundance of greenery and bursts of colourful blossoms.

Temperature

May sees a rise in the average high-temperature, climbing from a moderate 59°F (15°C) in April to a pleasant 69.3°F (20.7°C). Plainfield's nighttime temperature in May falls to an average of 52.9°F (11.6°C).

Humidity

In May, the average relative humidity is 77%.

Rainfall

In Plainfield, in May, during 16.3 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. In Plainfield, during the entire year, the rain falls for 160.7 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Plainfield aggregates 0.24" (6mm) of snow. Throughout the year, in Plainfield, there are 25.4 snowfall days, and 10.31" (262mm) of snow is accumulated.

Daylight

In Plainfield, the average length of the day in May is 14h and 28min.
On the first day of May in Plainfield, sunrise is at 5:55 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:21 pm EDT.

Sunshine

In Plainfield, the average sunshine in May is 8.6h.

UV index

In Plainfield, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. When the Sun is at its strongest around midday, find shade and limit exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

An average high-temperature, in May, in Plainfield, is 69.3°F (20.7°C) and the average low-temperature is 52.9°F (11.6°C).

What is the average humidity in May?

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

How much does it rain in May?

In May, the rain falls for 16.3 days. Throughout May, 2.8" (71mm) of precipitation is accumulated.

What is the last month it snows?

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

How many hours of daylight does Plainfield have in May?

The average day length in May in Plainfield is 14h and 28min.

When is the sunrise / sunset in May in Plainfield?

In May, on the first day of the month, sunrise is at 5:55 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:21 pm EDT.

How long on average sun shines in May?

The average sunshine duration in May is 8.6h.

How high is the UV index in May?

In Plainfield, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Plainfield, NJ

Average temperature in May - 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
Plainfield, NJ

Average pressure in May - 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
Plainfield, NJ

Average wind speed in May - 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
Plainfield, NJ

Average humidity in May - 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
Plainfield, NJ

Average rainfall in May - 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
Plainfield, NJ

Average rainfall days in May - 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
Plainfield, NJ

Average snowfall in May - 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
Plainfield, NJ

Average snowfall days in May - 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
Plainfield, NJ

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

Average sunshine days in May - 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
Plainfield, NJ

Average UV index in May - 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
Plainfield, NJ

Average cloud cover in May - 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
Plainfield, NJ

Average visibility in May - 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).

Plainfield, New Jersey, USA

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