August weather forecast
Trenton, NJ

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A full aerial view of Trenton, New Jersey, with the George Washington statue
A full aerial view of Trenton, New Jersey, with the George Washington statue

Weather in August

August brings slightly cooler temperatures but remains well within the summer envelope. Despite the decline in temperatures, the city registers the highest relative humidity for the year. Rainfall is relatively high this month, with the precipitation accumulating to a significant 3.5in. Still, locals and visitors enjoy outdoor activities amidst the warmth and sunlight. Trenton keeps its summer spirit alive well into August.

Temperature

The arrival of August brings an average high-temperature of a still moderately hot 82.9°F (28.3°C), nearly identical to July's 85.1°F (29.5°C). Trenton, during August, witnesses an average low-temperature of 66.4°F (19.1°C).

Heat index

The average heat index in August is computed to be a tropical 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Data suggests that the heat index is set for environments in shade and with a light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in August is 74%.

Rainfall

In Trenton, in August, it is raining for 15.9 days, with typically 3.5" (89mm) of accumulated precipitation. Throughout the year, there are 156.8 rainfall days, and 31.81" (808mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In August, the average length of the day is 13h and 43min.
On the first day of the month, sunrise is at 5:57 am and sunset at 8:12 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:31 pm EDT.

Sunshine

In Trenton, the average sunshine in August is 10.2h.

UV index

The months with the highest UV index in Trenton are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.

Frequently asked questions

How hot does it get in August?

The high-temperature, in August, in Trenton, is 82.9°F (28.3°C), while the low-temperature averages to 66.4°F (19.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in August?

In August, the average relative humidity in Trenton, New Jersey, is 74%.

How many days does it rain in August?

In Trenton, in August, it is raining for 15.9 days, with typically 3.5" (89mm) of accumulated precipitation.

When it does not snow?

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

How many hours of daylight does Trenton have in August?

The average day length in August in Trenton is 13h and 43min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 5:57 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:31 pm EDT.

How many hours of sunshine does Trenton have in August?

The average sunshine duration in August is 10.2h.

When is the highest UV index?

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

How high is the UV index in August?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to 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
Trenton, NJ

Average temperature in August - Trenton, NJ
  • Average high temperature in August: 82.9°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in August: 66.4°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

Average pressure in August
Trenton, NJ

Average pressure in August - Trenton, 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
Trenton, NJ

Average wind speed in August - Trenton, NJ
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in August
Trenton, NJ

Average humidity in August - Trenton, NJ
  • Average humidity in August: 74%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in August
Trenton, NJ

Average rainfall in August - Trenton, NJ
  • Average rainfall in August: 3.5"

The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in August
Trenton, NJ

Average rainfall days in August - Trenton, NJ
  • Average rainfall days in August: 15.9 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in August
Trenton, NJ

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

The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Trenton, NJ

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

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Trenton, 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 24min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in August
Trenton, NJ

Average sunshine days in August - Trenton, NJ
  • Average sunshine days in August: 12.3 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).

Average UV index in August
Trenton, NJ

Average UV index in August - Trenton, NJ
  • Average UV index in August: 6

The months with the highest UV index are May, 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
Trenton, NJ

Average cloud cover in August - Trenton, NJ
  • Average cloud cover in August: 32

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 32).

Average visibility in August
Trenton, NJ

Average visibility in August - Trenton, 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).

Trenton, New Jersey, USA

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