August weather forecast
Denville, NJ

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Weather in August

August, the last month of the summer in Denville, is another warm month, with an average temperature ranging between max 81.3°F (27.4°C) and min 63°F (17.2°C).

Temperature

Denville's shift from July to August is accompanied by an average high-temperature of a still warm 81.3°F (27.4°C), a slight deviation from 83.1°F (28.4°C). The average temperature drops to a refreshing 63°F (17.2°C) during the night in the month of August.

Heat index

The average heat index in August is evaluated at a tropical 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', embodies the combination of air temperature and moisture content to illustrate perceived heat. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. 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.

Humidity

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

Rainfall

In Denville, during August, the rain falls for 15 days and regularly aggregates up to 2.64" (67mm) of precipitation. In Denville, during the entire year, the rain falls for 161.2 days and collects up to 33.74" (857mm) of precipitation.

Snowfall

June through September are months without snowfall in Denville.

Daylight

The average length of the day in August is 13h and 46min.
On the first day of the month, sunrise is at 5:54 am and sunset at 8:13 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:31 pm EDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in August in Denville?

The average high-temperature and low-temperature in Denville during August are 81.3°F (27.4°C) and 63°F (17.2°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is evaluated at 86°F (30°C).

What is the average humidity in August in Denville?

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

How much does it rain in Denville in August?

In Denville, in August, during 15 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

When it does not snow in Denville?

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

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

The average day length in August is 13h and 46min.

When is the sunrise / sunset in August in Denville?

On the first day of August, sunrise is at 5:54 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:31 pm EDT.

How long on average sun shines in August in Denville?

In August, the average sunshine duration in Denville, New Jersey, is 9.9h.

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

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

How high is the UV index in August in Denville?

The average daily maximum UV index in August in Denville, New Jersey, is 6. A UV Index estimate of 6 to 7 represents a high health risk 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
Denville, NJ

Average temperature in August - Denville, NJ
  • Average high temperature in August: 81.3°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 August: 63°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 August
Denville, NJ

Average pressure in August - Denville, NJ
  • Average pressure in August: 29.99"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
Denville, NJ

Average wind speed in August - Denville, NJ
  • Average wind speed in August: 5.2mph

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 August
Denville, NJ

Average humidity in August - Denville, NJ
  • Average humidity in August: 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 August
Denville, NJ

Average rainfall in August - Denville, NJ
  • Average rainfall in August: 2.64"

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 August
Denville, NJ

Average rainfall days in August - Denville, NJ
  • Average rainfall days in August: 15 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 August
Denville, NJ

Average snowfall in August - Denville, NJ
  • Average snowfall in August: 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 August
Denville, NJ

Average snowfall days in August - Denville, NJ
  • Average snowfall days in August: 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 August /
Average sunshine in August
Denville, NJ

Average daylight in August / Average sunshine in August - Denville, NJ
  • Average daylight in August: 13h 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 August: 9h and 5min

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 August
Denville, NJ

Average sunshine days in August - Denville, NJ
  • Average sunshine days in August: 13.3 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 August
Denville, NJ

Average UV index in August - Denville, NJ
  • Average UV index in August: 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 August
Denville, NJ

Average cloud cover in August - Denville, NJ
  • Average cloud cover in August: 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 August
Denville, NJ

Average visibility in August - Denville, NJ
  • Average visibility in August: 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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