August weather forecast
Rocky Hill, NJ

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Weather in August

The last month of the summer, August, is another warm month in Rocky Hill, New Jersey, with an average temperature varying between 65.8°F (18.8°C) and 82.9°F (28.3°C).

Temperature

The commencement of August records an average high-temperature of a still warm 82.9°F (28.3°C), barely varying from July's 84.7°F (29.3°C). An average nighttime temperature of 65.8°F (18.8°C) is recorded in Rocky Hill during August.

Heat index

The heat index for August is computed to be a hot 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Heat index evaluations are typically in the context of light winds and shaded environments. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. 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 particularly relevant to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

In August, the average relative humidity is 75%.

Rainfall

In Rocky Hill, during August, the rain falls for 12.6 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 119.3 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

Snowfall

In Rocky Hill, snow does not fall in June through October.

Daylight

The average length of the day in August in Rocky Hill is 13h and 44min.
On the first day of August, sunrise is at 5:56 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:31 pm EDT.

Sunshine

The average sunshine in August in Rocky Hill 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 estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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Frequently asked questions

How hot does it get in Rocky Hill in August?

The high-temperature in Rocky Hill during August is 82.9°F (28.3°C) and the low-temperature is 65.8°F (18.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in August in Rocky Hill?

The average relative humidity in August in Rocky Hill, New Jersey, is 75%.

How many days does it rain in August in Rocky Hill?

In Rocky Hill, in August, during 12.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

When it does not snow in Rocky Hill?

In Rocky Hill, snow does not fall in June through October.

What is the average length of the day in August in Rocky Hill?

The average day length in August in Rocky Hill, New Jersey, is 13h and 44min.

What time are sunrise and sunset in August in Rocky Hill?

On the first day of August, sunrise is at 5:56 am and sunset at 8:12 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 Rocky Hill?

In August, the average sunshine duration in Rocky Hill, New Jersey, is 10.1h.

What are the months with the highest UV index in Rocky Hill?

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

How high is the UV index in August in Rocky Hill?

In Rocky Hill, New Jersey, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high hazard to health 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
Rocky Hill, NJ

Average temperature in August - Rocky Hill, NJ
  • Average high temperature in August: 82.9°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in August
Rocky Hill, NJ

Average pressure in August - Rocky Hill, 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).

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Average wind speed in August
Rocky Hill, NJ

Average wind speed in August - Rocky Hill, NJ
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in August
Rocky Hill, NJ

Average humidity in August - Rocky Hill, NJ
  • Average humidity in August: 75%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in August
Rocky Hill, NJ

Average rainfall in August - Rocky Hill, NJ
  • Average rainfall in August: 1.5"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is September (0.67").

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Average rainfall days in August
Rocky Hill, NJ

Average rainfall days in August - Rocky Hill, NJ
  • Average rainfall days in August: 12.6 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

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Average snowfall in August
Rocky Hill, NJ

Average snowfall in August - Rocky Hill, NJ
  • Average snowfall in August: 0"

The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Rocky Hill, NJ

Average snowfall days in August - Rocky Hill, NJ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Rocky Hill, NJ

Average daylight in August / Average sunshine in August - Rocky Hill, NJ
  • Average daylight in August: 13h 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 18min).

  • Average sunshine in August: 10h and 1min

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 48min).

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Average sunshine days in August
Rocky Hill, NJ

Average sunshine days in August - Rocky Hill, NJ
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in August
Rocky Hill, NJ

Average UV index in August - Rocky Hill, 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).

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Average cloud cover in August
Rocky Hill, NJ

Average cloud cover in August - Rocky Hill, NJ
  • Average cloud cover in August: 33

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 33).

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Average visibility in August
Rocky Hill, NJ

Average visibility in August - Rocky Hill, 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).

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Rocky Hill, New Jersey, USA

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