August weather forecast
Caldwell, NJ

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Weather in August

August, the last month of the summer in Caldwell, is another warm month, with an average temperature fluctuating between 64.9°F (18.3°C) and 82°F (27.8°C).

Temperature

The average high-temperature during August registers at a still moderately hot 82°F (27.8°C), closely corresponding to the preceding month. Caldwell, during the month of August, experiences an average low-temperature of 64.9°F (18.3°C).

Heat index

August's heat index is estimated at a hot 87.8°F (31°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

April and August, with an average relative humidity of 73%, are the least humid months.

Rainfall

In August, the rain falls for 16.1 days. Throughout August, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 158 rainfall days, and 27.4" (696mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In Caldwell, the average length of the day in August is 13h and 45min.
On the first day of August in Caldwell, New Jersey, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:30 pm EDT.

Sunshine

In August, the average sunshine in Caldwell is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Shield from overexposure. Defense against sun-related harm is required. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are August temperatures in Caldwell?

In Caldwell, 82°F (27.8°C) is the average high-temperature and 64.9°F (18.3°C) is the average low-temperature during August. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 87.8°F (31°C).

What is the least humid month in Caldwell?

April and August, with an average relative humidity of 73%, are the least humid months.

What is the average humidity in August in Caldwell?

In Caldwell, the average relative humidity in August is 73%.

How many days does it rain in August in Caldwell?

In Caldwell, in August, it is raining for 16.1 days, with typically 2.68" (68mm) of accumulated precipitation.

When it does not snow in Caldwell?

In Caldwell, New Jersey, snow does not fall in June through October.

How many hours of daylight does Caldwell have in August?

In August, the average day length in Caldwell is 13h and 45min.

When is the sunrise / sunset in August in Caldwell?

In August, on the first day of the month, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of the month, in Caldwell, sunrise is at 6:23 am and sunset at 7:30 pm EDT.

How many hours of sunshine does Caldwell have in August?

The average sunshine duration in August in Caldwell is 10.1h.

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

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

How high is the UV index in August in Caldwell?

In Caldwell, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
Caldwell, NJ

Average temperature in August - Caldwell, NJ
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in August
Caldwell, NJ

Average pressure in August - Caldwell, 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).

Average wind speed in August
Caldwell, NJ

Average wind speed in August - Caldwell, NJ
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in August
Caldwell, NJ

Average humidity in August - Caldwell, NJ
  • Average humidity in August: 73%

The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are April and August (73%).

Average rainfall in August
Caldwell, NJ

Average rainfall in August - Caldwell, NJ
  • Average rainfall in August: 2.68"

The wettest month (with the highest rainfall) is July (3.15").
The driest month (with the least rainfall) is January (1.57").

Average rainfall days in August
Caldwell, NJ

Average rainfall days in August - Caldwell, NJ
  • Average rainfall days in August: 16.1 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in August
Caldwell, NJ

Average snowfall in August - Caldwell, NJ
  • Average snowfall in August: 0"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in August
Caldwell, NJ

Average snowfall days in August - Caldwell, NJ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Caldwell, NJ

Average daylight in August / Average sunshine in August - Caldwell, 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: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in August
Caldwell, NJ

Average sunshine days in August - Caldwell, NJ
  • Average sunshine days in August: 12.1 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (10.7 days).

Average UV index in August
Caldwell, NJ

Average UV index in August - Caldwell, 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
Caldwell, NJ

Average cloud cover in August - Caldwell, NJ
  • Average cloud cover in August: 33

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in August
Caldwell, NJ

Average visibility in August - Caldwell, 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).

Caldwell, New Jersey, USA

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