August weather forecast
South Plainfield, NJ

Share

Weather in August

The last month of the summer, August, is also a moderately hot month in South Plainfield, New Jersey, with temperature in the range of an average low of 66.2°F (19°C) and an average high of 82°F (27.8°C).

Temperature

August welcomes an average high-temperature of a still warm 82°F (27.8°C), not much different from the preceding month. In South Plainfield, the nighttime temperature averages to a comfortable 66.2°F (19°C) during August.

Heat index

In August, the heat index is calculated to be a tropical 87.8°F (31°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.

Humidity

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

Rainfall

In South Plainfield, during August, the rain falls for 15.6 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 160.7 rainfall days, and 30.12" (765mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In South Plainfield, the average length of the day in August is 13h and 44min.
On the first day of August, sunrise is at 5:55 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:30 pm EDT.

Sunshine

In August, the average sunshine is 10.1h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 in August translates into these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are August temperatures in South Plainfield?

In August, the average high-temperature and low-temperature are 82°F (27.8°C) and 66.2°F (19°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 87.8°F (31°C).

What are the least humid months?

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

What is the average humidity in August?

In South Plainfield, New Jersey, the average relative humidity in August is 73%.

How many days does it rain in August?

In South Plainfield, in August, it is raining for 15.6 days, with typically 2.6" (66mm) of accumulated precipitation.

When it does not snow in South Plainfield?

In South Plainfield, New Jersey, snow does not fall in June through September.

What is the average length of the day in August?

In August, the average day length is 13h and 44min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 5:55 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:30 pm EDT.

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

In South Plainfield, New Jersey, the average sunshine duration in August is 10.1h.

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

The months with the highest UV index are June through August, with an average maximum UV index of 6.

How high is the UV index in August in South Plainfield?

In South Plainfield, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high 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 August
South Plainfield, NJ

Average temperature in August - South Plainfield, NJ
  • Average high temperature in August: 82°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 August: 66.2°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 August
South Plainfield, NJ

Average pressure in August - South Plainfield, NJ
  • Average pressure in August: 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).

Average wind speed in August
South Plainfield, NJ

Average wind speed in August - South Plainfield, NJ
  • Average wind speed in August: 5.7mph

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 August
South Plainfield, NJ

Average humidity in August - South Plainfield, NJ
  • Average humidity in August: 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%).

Average rainfall in August
South Plainfield, NJ

Average rainfall in August - South Plainfield, NJ
  • Average rainfall in August: 2.6"

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 August
South Plainfield, NJ

Average rainfall days in August - South Plainfield, NJ
  • Average rainfall days in August: 15.6 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 August
South Plainfield, NJ

Average snowfall in August - South Plainfield, NJ
  • Average snowfall in August: 0"

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 August
South Plainfield, NJ

Average snowfall days in August - South Plainfield, NJ
  • Average snowfall days in August: 0 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 August /
Average sunshine in August
South Plainfield, NJ

Average daylight in August / Average sunshine in August - South Plainfield, NJ
  • Average daylight in August: 13h and 4min

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 August: 10h 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).

Average sunshine days in August
South Plainfield, NJ

Average sunshine days in August - South Plainfield, NJ
  • Average sunshine days in August: 13.3 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 August
South Plainfield, NJ

Average UV index in August - South Plainfield, NJ
  • Average UV index in August: 6

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 August
South Plainfield, NJ

Average cloud cover in August - South Plainfield, NJ
  • Average cloud cover in August: 32

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 August
South Plainfield, NJ

Average visibility in August - South Plainfield, NJ
  • Average visibility in August: 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).

South Plainfield, New Jersey, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location