July weather forecast
Denville, NJ

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Weather in July

July, the same as June, is another warm summer month in Denville, New Jersey, with an average temperature ranging between max 83.1°F (28.4°C) and min 64.8°F (18.2°C).

Temperature

Denville's warmest month, July, registers temperatures that range from a high of 83.1°F (28.4°C) to a low of 64.8°F (18.2°C).

Heat index

The average heat index in July is evaluated at a hot 89.6°F (32°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

In Denville, New Jersey, the average relative humidity in July is 76%.

Rainfall

In Denville, in July, during 17.4 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. In Denville, during the entire year, the rain falls for 161.2 days and collects up to 33.74" (857mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in July in Denville is 14h and 46min.
On the first day of July, sunrise is at 5:30 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 8:14 pm EDT.

Sunshine

July has the most sunshine of the year in Denville, with an average of 10.2h of sunshine.

UV index

The months with the highest UV index in Denville, New Jersey, are June 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 the ordinary person.
Note: During July, 6 as the daily maximum UV index converts into the following advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months in Denville?

July is the warmest month in Denville, with an average high-temperature of 83.1°F (28.4°C) and an average low-temperature of 64.8°F (18.2°C).

How hot does it get in Denville in July?

In July, the average high-temperature and low-temperature in Denville are 83.1°F (28.4°C) and 64.8°F (18.2°C) respectively. In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in July in Denville?

In Denville, the average relative humidity in July is 76%.

How many days does it rain in July in Denville?

In Denville, in July, it is raining for 17.4 days, with typically 3.31" (84mm) of accumulated precipitation.

When it does not snow in Denville?

June through September are months without snowfall in Denville, New Jersey.

What is the average length of the day in July in Denville?

The average day length in July in Denville is 14h and 46min.

When is the sunrise / sunset in July in Denville?

On the first day of July, sunrise is at 5:30 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 8:14 pm EDT.

What month has the most sunshine in Denville?

The month with the most sunshine in Denville is July, with an average of 10.2h of sunshine.

How many hours of sunshine does Denville have in July?

In Denville, New Jersey, the average sunshine duration in July is 10.2h.

When is the highest UV index in Denville?

The months with the highest UV index in Denville, New Jersey, are June through August, with an average maximum UV index of 6.

How high is the UV index in July in Denville?

The average daily maximum UV index in July is 6. A UV Index reading 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
Denville, NJ

Average temperature in July - Denville, NJ
  • Average high temperature in July: 83.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in July: 64.8°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in July
Denville, NJ

Average pressure in July - Denville, 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
Denville, NJ

Average wind speed in July - Denville, NJ
  • Average wind speed in July: 5.3mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in July
Denville, NJ

Average humidity in July - Denville, NJ
  • Average humidity in July: 76%

The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (74%).

Average rainfall in July
Denville, NJ

Average rainfall in July - Denville, NJ
  • Average rainfall in July: 3.31"

The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in July
Denville, NJ

Average rainfall days in July - Denville, NJ
  • Average rainfall days in July: 17.4 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in July
Denville, NJ

Average snowfall in July - Denville, NJ
  • Average snowfall in July: 0"

The month with the highest snowfall is March (4.69").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Denville, NJ

Average snowfall days in July - Denville, NJ
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Denville, NJ

Average daylight in July / Average sunshine in July - Denville, NJ
  • Average daylight in July: 14h 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 July: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days in July
Denville, NJ

Average sunshine days in July - Denville, NJ
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is April (11.2 days).

Average UV index in July
Denville, NJ

Average UV index in July - Denville, NJ
  • Average UV index in July: 6

The months with the highest UV index are 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
Denville, NJ

Average cloud cover in July - Denville, NJ
  • Average cloud cover in July: 35

The months with the most cloud cover are February, March and December (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 35).

Average visibility in July
Denville, NJ

Average visibility in July - Denville, NJ
  • Average visibility in July: 6mi

The months with the highest visibility are January, April, July, August, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June and September (5mi).

Denville, New Jersey, USA

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