August weather forecast
Mendham, NJ

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Weather in August

August, the last month of the summer in Mendham, is also a moderately hot month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 63°F (17.2°C).

Temperature

August's advent presents an average high-temperature of a still moderately hot 81.3°F (27.4°C), indicating a slight variation from the conditions of the previous month. Mendham records an average nighttime low-temperature of 63°F (17.2°C) throughout August.

Heat index

During August, the heat index is estimated at a hot 86°F (30°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
The standards for the heat index are set for locations in shade and under light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in August is 76%.

Rainfall

In August, in Mendham, New Jersey, the rain falls for 15.5 days. Throughout August, 2.91" (74mm) of precipitation is accumulated. In Mendham, during the entire year, the rain falls for 162.6 days and collects up to 33.11" (841mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August is 13h and 45min.
On the first day of the month, sunrise is at 5:55 am and sunset at 8:13 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:31 pm EDT.

Sunshine

In Mendham, the average sunshine in August is 10h.

UV index

In August, the average daily maximum UV index in Mendham, New Jersey, is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 5 during August leads to these instructions:
Take precautions - Protection against sunburn is recommended. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
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Frequently asked questions

What are the temperatures in Mendham in August?

During August, Mendham experiences an average high-temperature of 81.3°F (27.4°C) and a low-temperature of 63°F (17.2°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is estimated at 86°F (30°C).

What is the average humidity in August in Mendham?

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

How many days does it rain in August in Mendham?

In August, in Mendham, the rain falls for 15.5 days. Throughout August, 2.91" (74mm) of precipitation is accumulated.

When it does not snow in Mendham?

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

How many hours of daylight does Mendham have in August?

The average day length in August in Mendham, New Jersey, is 13h and 45min.

What time are sunrise and sunset in August in Mendham?

In August, on the first day of the month, sunrise is at 5:55 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:31 pm EDT.

How long on average sun shines in August in Mendham?

In Mendham, New Jersey, the average sunshine duration in August is 10h.

How high is the UV index in August in Mendham?

The average daily maximum UV index in August in Mendham, New Jersey, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's 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
Mendham, NJ

Average temperature in August - Mendham, NJ
  • Average high temperature in August: 81.3°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°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 (22.3°F).

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Average pressure in August
Mendham, NJ

Average pressure in August - Mendham, 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).

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Average wind speed in August
Mendham, NJ

Average wind speed in August - Mendham, NJ
  • Average wind speed in August: 5.1mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in August
Mendham, NJ

Average humidity in August - Mendham, NJ
  • Average humidity in August: 76%

The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in August
Mendham, NJ

Average rainfall in August - Mendham, NJ
  • Average rainfall in August: 2.91"

The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days in August
Mendham, NJ

Average rainfall days in August - Mendham, NJ
  • Average rainfall days in August: 15.5 days

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (8.9 days).

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Average snowfall in August
Mendham, NJ

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

The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Mendham, NJ

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

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Mendham, NJ
  • Average daylight in August: 13h and 4min

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 0min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Mendham, NJ

Average sunshine days in August - Mendham, NJ
  • Average sunshine days in August: 12.4 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (11.4 days).

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Average UV index in August
Mendham, NJ

Average UV index in August - Mendham, NJ
  • Average UV index in August: 5

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

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Average cloud cover in August
Mendham, NJ

Average cloud cover in August - Mendham, NJ
  • Average cloud cover in August: 34

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

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Average visibility in August
Mendham, NJ

Average visibility in August - Mendham, NJ
  • Average visibility in August: 6mi

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

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Mendham, New Jersey, USA

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