August weather forecast
Sussex, NJ

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Weather in August

August, the last month of the summer in Sussex, is also a moderately hot month, with an average temperature fluctuating between 80.2°F (26.8°C) and 59.5°F (15.3°C).

Temperature

Sussex experiences a recorded average high-temperature of a still warm 80.2°F (26.8°C) in August, closely aligned with July's 82.6°F (28.1°C). In Sussex, an average temperature of 59.5°F (15.3°C) is noted during August nights.

Humidity

The average relative humidity in August is 78%.

Rainfall

In Sussex, during August, the rain falls for 15.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, in Sussex, there are 164.9 rainfall days, and 31.89" (810mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in August is 13h and 46min.
On the first day of August, sunrise is at 5:54 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:32 pm EDT.

Sunshine

In Sussex, the average sunshine in August is 9.9h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 5 in August translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are August temperatures?

In August, in Sussex, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 59.5°F (15.3°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 89.6°F (32°C).

What is the average humidity in August?

The average relative humidity in August is 78%.

How many days does it rain in August in Sussex?

In Sussex, New Jersey, during August, the rain falls for 15.5 days and regularly aggregates up to 2.6" (66mm) of precipitation.

When it does not snow?

June through September are months without snowfall in Sussex.

What is the average length of the day in August?

In Sussex, the average day length in August is 13h and 46min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 5:54 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:32 pm EDT.

How many hours of sunshine does Sussex have in August?

In August, the average sunshine duration is 9.9h.

When is the highest UV index?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

How high is the UV index in August?

In Sussex, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk 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
Sussex, NJ

Average temperature in August - Sussex, NJ
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.7°F).

  • Average low temperature in August: 59.5°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in August
Sussex, NJ

Average pressure in August - Sussex, NJ
  • Average pressure in August: 29.99"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
Sussex, NJ

Average wind speed in August - Sussex, NJ
  • Average wind speed in August: 4.8mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in August
Sussex, NJ

Average humidity in August - Sussex, NJ
  • Average humidity in August: 78%

The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in August
Sussex, NJ

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

The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in August
Sussex, NJ

Average rainfall days in August - Sussex, NJ
  • Average rainfall days in August: 15.5 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (8.7 days).

Average snowfall in August
Sussex, NJ

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

The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Sussex, NJ

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

The months with the highest number of snowfall days are January and February (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Sussex, NJ
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

Average sunshine days in August
Sussex, NJ

Average sunshine days in August - Sussex, NJ
  • Average sunshine days in August: 12.9 days

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.4 days).

Average UV index in August
Sussex, NJ

Average UV index in August - Sussex, NJ
  • Average UV index in August: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
Sussex, NJ

Average cloud cover in August - Sussex, NJ
  • Average cloud cover in August: 37

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in August
Sussex, NJ

Average visibility in August - Sussex, NJ
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).

Sussex, New Jersey, USA

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