July 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 July

July is Trenton's warmest month and sits at the height of the summer season. High daily average temperatures reach a toasty 85.1°F (29.5°C), the highest on record for the year. Coupled with relatively low cloud cover, the city enjoys ample sunshine. Leisure activities continue in full swing, benefiting from the extended daylight hours. Despite being the warmest month, July inherits the crown for Trenton's summer charm.

Temperature

July is the month when Trenton, New Jersey, experiences its warmest temperatures, averaging a high of 85.1°F (29.5°C) and a low of 67.3°F (19.6°C).

Heat index

The heat index value during July is evaluated at a torrid 95°F (35°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
The heat index's values are generally associated with conditions in shade and light breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in July is 74%.

Rainfall

July is the month with the most rainfall. Rain falls for 18.5 days and accumulates 3.74" (95mm) of precipitation.

Snowfall

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

Daylight

In Trenton, the average length of the day in July is 14h and 42min.
On the first day of July, sunrise is at 5:33 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:14 pm EDT.

Sunshine

The month with the most sunshine is July, with an average of 10.6h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 6 in July suggests the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the hottest?

The average temperatures reach their apex in July, averaging 85.1°F (29.5°C) at the high end and 67.3°F (19.6°C) at the low end.

How hot is July?

July temperatures vary between a high-temperature of 85.1°F (29.5°C) and a low-temperature of 67.3°F (19.6°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 95°F (35°C).

What is the average humidity in July?

The average relative humidity in July is 74%.

What is the wettest month in Trenton?

July is the month with the most rainfall. Rain falls for 18.5 days and accumulates 3.74" (95mm) of precipitation.

How many days does it rain in July?

In Trenton, during July, the rain falls for 18.5 days and regularly aggregates up to 3.74" (95mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

How many hours of daylight does Trenton have in July?

In July, the average day length is 14h and 42min.

What time are sunrise and sunset in July?

In July, on the first day of the month, sunrise is at 5:33 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:14 pm EDT.

What month has the most sunshine?

The month with the most sunshine is July, with an average of 10.6h of sunshine.

How many hours of sunshine does Trenton have in July?

The average sunshine duration in July is 10.6h.

What are the months with the highest UV index?

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

What is the UV index intensity in July?

The average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe 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 July
Trenton, NJ

Average temperature in July - Trenton, NJ
  • Average high temperature in July: 85.1°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 July: 67.3°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 July
Trenton, NJ

Average pressure in July - Trenton, NJ
  • Average pressure in July: 29.96"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 July
Trenton, NJ

Average wind speed in July - Trenton, NJ
  • Average wind speed in July: 5.5mph

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 July
Trenton, NJ

Average humidity in July - Trenton, NJ
  • Average humidity in July: 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 July
Trenton, NJ

Average rainfall in July - Trenton, NJ
  • Average rainfall in July: 3.74"

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 July
Trenton, NJ

Average rainfall days in July - Trenton, NJ
  • Average rainfall days in July: 18.5 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 July
Trenton, NJ

Average snowfall in July - Trenton, NJ
  • Average snowfall in July: 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 July
Trenton, NJ

Average snowfall days in July - Trenton, NJ
  • Average snowfall days in July: 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 July /
Average sunshine in July
Trenton, NJ

Average daylight in July / Average sunshine in July - Trenton, NJ
  • Average daylight in July: 14h 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 July: 10h and 4min

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 July
Trenton, NJ

Average sunshine days in July - Trenton, NJ
  • Average sunshine days in July: 9.3 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 July
Trenton, NJ

Average UV index in July - Trenton, NJ
  • Average UV index in July: 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 July
Trenton, NJ

Average cloud cover in July - Trenton, NJ
  • Average cloud cover in July: 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 July
Trenton, NJ

Average visibility in July - Trenton, NJ
  • Average visibility in July: 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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