August weather forecast
Harrison, NJ

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Weather in August

August, the last month of the summer in Harrison, is another warm month, with an average temperature ranging between max 81.3°F (27.4°C) and min 68.9°F (20.5°C).

Temperature

August's onset sees an average high-temperature of a still moderately hot 81.3°F (27.4°C), exhibiting a slight fluctuation from the previous month. During August, Harrison sees a mean low-temperature of 68.9°F (20.5°C).

Heat index

The heat index in August is computed to be a tropical 86°F (30°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Know that the heat index computations account for shaded terrains and slight winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

With an average relative humidity of 70%, August is the least humid month in Harrison.

Rainfall

In August, the rain falls for 15.4 days. Throughout August, 2.6" (66mm) of precipitation is accumulated. In Harrison, during the entire year, the rain falls for 150.3 days and collects up to 27.72" (704mm) of precipitation.

Snowfall

May through October are months without snowfall in Harrison, New Jersey.

Daylight

In Harrison, the average length of the day in August is 13h and 45min.
On the first day of August in Harrison, sunrise is at 5:53 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:30 pm EDT.

Sunshine

In Harrison, the average sunshine in August is 10.5h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 6 during August morphs into the following directions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Harrison in August?

The high-temperature in Harrison during August is 81.3°F (27.4°C) and the low-temperature is 68.9°F (20.5°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the least humid month in Harrison?

August is the least humid month in Harrison, with an average relative humidity of 70%.

What is the average humidity in August in Harrison?

In August, the average relative humidity in Harrison is 70%.

How many days does it rain in August in Harrison?

In August, in Harrison, the rain falls for 15.4 days. Throughout August, 2.6" (66mm) of precipitation is accumulated.

When it does not snow in Harrison?

In Harrison, New Jersey, snow does not fall in May through October.

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

In August, the average day length in Harrison is 13h and 45min.

When is the sunrise / sunset in August in Harrison?

In August, on the first day of the month, sunrise is at 5:53 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:30 pm EDT.

How many hours of sunshine does Harrison have in August?

In Harrison, New Jersey, the average sunshine duration in August is 10.5h.

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

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

How high is the UV index in August in Harrison?

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 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
Harrison, NJ

Average temperature in August - Harrison, NJ
  • Average high temperature in August: 81.3°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in August: 68.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in August
Harrison, NJ

Average pressure in August - Harrison, NJ
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Harrison, NJ

Average wind speed in August - Harrison, NJ
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in August
Harrison, NJ

Average humidity in August - Harrison, NJ
  • Average humidity in August: 70%

The months with the highest relative humidity are February and December (75%).
The month with the lowest relative humidity is August (70%).

Average rainfall in August
Harrison, NJ

Average rainfall in August - Harrison, NJ
  • Average rainfall in August: 2.6"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and February (1.69").

Average rainfall days in August
Harrison, NJ

Average rainfall days in August - Harrison, NJ
  • Average rainfall days in August: 15.4 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in August
Harrison, NJ

Average snowfall in August - Harrison, NJ
  • Average snowfall in August: 0"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Harrison, NJ

Average snowfall days in August - Harrison, NJ
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in August / Average sunshine in August - Harrison, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in August
Harrison, NJ

Average sunshine days in August - Harrison, NJ
  • Average sunshine days in August: 13.2 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (12 days).

Average UV index in August
Harrison, NJ

Average UV index in August - Harrison, 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
Harrison, NJ

Average cloud cover in August - Harrison, NJ
  • Average cloud cover in August: 29

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in August
Harrison, NJ

Average visibility in August - Harrison, NJ
  • Average visibility in August: 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).

Harrison, New Jersey, USA

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