Trenton
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Trenton, NJ

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
The last month of the summer, August, is another warm month in Trenton, New Jersey, with average temperature ranging between min 66.4°F (19.1°C) and max 82.9°F (28.3°C).

Temperature

In Trenton, the average high-temperature in August is relatively the same as in July - a still moderately hot 82.9°F (28.3°C). The average low-temperature, in Trenton, is 66.4°F (19.1°C).

Heat index

In August, the average heat index is evaluated at a tropical 89.4°F (31.9°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, wind, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for 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

In August, the average relative humidity is 74%.

Rainfall

In August, the rain falls for 15.9 days. Throughout August, 3.5" (89mm) of precipitation is accumulated. In Trenton, during the entire year, the rain falls for 156.8 days and collects up to 31.81" (808mm) of precipitation.

Snowfall

June through September are months without snowfall in Trenton.

Daylight

In August, the average length of the day in Trenton is 13.7h.

Sunshine

In Trenton, the average sunshine is 10.2h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in August interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Trenton?

In Trenton, New Jersey, in August, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 66.4°F (19.1°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), that factores the actual air temperature with the relative humidity, is estimated at 89.4°F (31.9°C).

What is the average humidity in August in Trenton?

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

How many days does it rain in August in Trenton?

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

When it does not snow in Trenton?

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

How many hours of daylight does Trenton have in August?

In Trenton, New Jersey, the average length of the day in August is 13.7h.

How many hours of sunshine does Trenton have in August?

The average sunshine in August in Trenton is 10.2h.

When is the highest UV index in Trenton?

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

How high is the UV index in August in Trenton?

In August, the average daily maximum UV index in Trenton is 6. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in August - Trenton, NJ
  • Average high temperature in August: 28.3°C

The warmest month (with the highest average high temperature) is July (29.5°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in August: 19.1°C

The month with the highest average low temperature is July (19.6°C).
The coldest month (with the lowest average low temperature) is January (-4°C).

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

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: 89mm

The wettest month (with the highest rainfall) is July (95mm).
The driest month (with the lowest rainfall) is January (47mm).

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 lowest number of rainy days is January (7.9 days).

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

The month with the highest snowfall is March (69mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Trenton, NJ
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in August: 10.2h

The month with most sunshine is July (Average sunshine: 10.6h).
The month with least sunshine is February (Average sunshine: 4.8h).

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

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).