August weather forecast
Mountainside, NJ

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Weather in August

The last month of the summer, August, is also a moderately hot month in Mountainside, New Jersey, with an average temperature varying between 66.2°F (19°C) and 82°F (27.8°C).

Temperature

Mountainside registers an average high-temperature of a still moderately hot 82°F (27.8°C) at the commencement of August, closely related to the preceding month. Nighttime temperature in Mountainside dips to a mean of 66.2°F (19°C) during August.

Heat index

The average heat index in August is evaluated at a hot 87.8°F (31°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.
Heat index determinations are made taking into account the shade and light air movements. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

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

Rainfall

In Mountainside, in August, it is raining for 15.6 days, with typically 2.6" (66mm) of accumulated precipitation. In Mountainside, during the entire year, the rain falls for 160.7 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

In Mountainside, snow does not fall in June through September.

Daylight

The average length of the day in August is 13h and 44min.
On the first day of the month, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:30 pm EDT.

Sunshine

The average sunshine in August in Mountainside is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in August interprets into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

What are August temperatures in Mountainside?

In August, in Mountainside, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 66.2°F (19°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 87.8°F (31°C).

What are the least humid months in Mountainside?

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

What is the average humidity in August in Mountainside?

The average relative humidity in August in Mountainside, New Jersey, is 73%.

How many days does it rain in August in Mountainside?

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

When it does not snow in Mountainside?

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

What is the average length of the day in August in Mountainside?

The average day length in August is 13h and 44min.

When is the sunrise / sunset in August in Mountainside?

In August, on the first day of the month, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of the month, in Mountainside, sunrise is at 6:24 am and sunset at 7:30 pm EDT.

How long on average sun shines in August in Mountainside?

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

What are the months with the highest UV index in Mountainside?

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

What is the UV index intensity in August in Mountainside?

In August, the average daily maximum UV index in Mountainside, New Jersey, is 6. A UV Index reading of 6 to 7 represents 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 August
Mountainside, NJ

Average temperature in August - Mountainside, 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).

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Average pressure in August
Mountainside, NJ

Average pressure in August - Mountainside, 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).

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Average wind speed in August
Mountainside, NJ

Average wind speed in August - Mountainside, 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).

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Average humidity in August
Mountainside, NJ

Average humidity in August - Mountainside, 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%).

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Average rainfall in August
Mountainside, NJ

Average rainfall in August - Mountainside, 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").

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Average rainfall days in August
Mountainside, NJ

Average rainfall days in August - Mountainside, 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).

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Average snowfall in August
Mountainside, NJ

Average snowfall in August - Mountainside, 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").

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Average snowfall days in August
Mountainside, NJ

Average snowfall days in August - Mountainside, 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).

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Average daylight in August /
Average sunshine in August
Mountainside, NJ

Average daylight in August / Average sunshine in August - Mountainside, 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).

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Average sunshine days in August
Mountainside, NJ

Average sunshine days in August - Mountainside, 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).

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Average UV index in August
Mountainside, NJ

Average UV index in August - Mountainside, 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).

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Average cloud cover in August
Mountainside, NJ

Average cloud cover in August - Mountainside, 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).

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Average visibility in August
Mountainside, NJ

Average visibility in August - Mountainside, 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).

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Mountainside, New Jersey, USA

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