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 transition into August in Trenton shows a subtle variation to a still moderately hot 82.9°F (28.3°C) from July's 85.1°F (29.5°C) in the average high-temperature. In the month of August, the temperature generally rests at an average low of 66.4°F (19.1°C).

Heat index

In August, the heat index is calculated to be a tropical 89.6°F (32°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
Consider that heat index readings are for situations in the shade and light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

In Trenton, 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. In Trenton, during the entire year, the rain falls for 156.8 days and collects up to 31.81" (808mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August 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

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 value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 6 during August leads to these instructions:
Resist overexposure. Safeguarding from solar damage is indispensable. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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Frequently asked questions

How hot is it in Trenton in August?

In Trenton, 82.9°F (28.3°C) is the average high-temperature and 66.4°F (19.1°C) is the average low-temperature during August. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 89.6°F (32°C).

What is the average humidity in August in Trenton?

The average relative humidity in August is 74%.

How many days does it rain in August in Trenton?

In Trenton, New Jersey, during August, the rain falls for 15.9 days and regularly aggregates up to 3.5" (89mm) of precipitation.

When it does not snow in Trenton?

June through September are months without snowfall in Trenton.

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

In Trenton, New Jersey, the average day length in August is 13h and 43min.

What time are sunrise and sunset in August in Trenton?

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, in Trenton, sunrise is at 6:26 am and sunset at 7:31 pm EDT.

How long on average sun shines in August in Trenton?

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

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

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

What is the UV index reading in August in Trenton?

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high hazard to health 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
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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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Trenton, New Jersey, USA

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