August weather forecast
New Castle, VA

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Weather in August

The last month of the summer, August, is also a moderately hot month in New Castle, Virginia, with temperature in the range of an average high of 84.4°F (29.1°C) and an average low of 61.2°F (16.2°C).

Temperature

August's onset brings an average high-temperature of a warm 84.4°F (29.1°C), showing a minute difference from July's 86.5°F (30.3°C). August nights bring a significant cooling from the heat of the day, with averages of 61.2°F (16.2°C).

Heat index

In August, the average heat index is computed to be a hot 93.2°F (34°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Note that heat index values are valued for light wind and location in the shade. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.

Humidity

In New Castle, the average relative humidity in August is 74%.

Rainfall

In New Castle, in August, it is raining for 15.5 days, with typically 1.97" (50mm) of accumulated precipitation. In New Castle, during the entire year, the rain falls for 145.5 days and collects up to 25.04" (636mm) of precipitation.

Snowfall

In New Castle, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 34min.
On the first day of August, sunrise is at 6:25 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 7:50 pm EDT.

Sunshine

In New Castle, the average sunshine in August is 10.1h.

UV index

May 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 hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 6 in August translates into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot in New Castle during August?

The average high-temperature, in August, in New Castle, is 84.4°F (29.1°C), while the average low-temperature is 61.2°F (16.2°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 93.2°F (34°C).

What is the average humidity in August?

In August, the average relative humidity is 74%.

How much does it rain in August?

In August, the rain falls for 15.5 days. Throughout August, 1.97" (50mm) of precipitation is accumulated.

When it does not snow?

In New Castle, snow does not fall in May through September.

How many hours of daylight does New Castle have in August?

In August, the average day length is 13h and 34min.

What time are sunrise and sunset in August in New Castle?

On the first day of August, sunrise is at 6:25 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 7:50 pm EDT.

How many hours of sunshine does New Castle have in August?

In New Castle, the average sunshine duration in August is 10.1h.

What is the month with the highest UV index?

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

What is the UV index reading in August?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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
New Castle, VA

Average temperature in August - New Castle, VA
  • Average high temperature in August: 84.4°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (41.2°F).

  • Average low temperature in August: 61.2°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in August
New Castle, VA

Average pressure in August - New Castle, VA
  • Average pressure in August: 30.02"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in August
New Castle, VA

Average wind speed in August - New Castle, VA
  • Average wind speed in August: 3.9mph

The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

Average humidity in August
New Castle, VA

Average humidity in August - New Castle, VA
  • Average humidity in August: 74%

The months with the highest relative humidity are May, September and December (77%).
The month with the lowest relative humidity is July (72%).

Average rainfall in August
New Castle, VA

Average rainfall in August - New Castle, VA
  • Average rainfall in August: 1.97"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days in August
New Castle, VA

Average rainfall days in August - New Castle, VA
  • Average rainfall days in August: 15.5 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (7.6 days).

Average snowfall in August
New Castle, VA

Average snowfall in August - New Castle, VA
  • Average snowfall in August: 0"

The month with the highest snowfall is March (2.76").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
New Castle, VA

Average snowfall days in August - New Castle, VA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
New Castle, VA

Average daylight in August / Average sunshine in August - New Castle, VA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in August
New Castle, VA

Average sunshine days in August - New Castle, VA
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in August
New Castle, VA

Average UV index in August - New Castle, VA
  • Average UV index in August: 6

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

Average cloud cover in August
New Castle, VA

Average cloud cover in August - New Castle, VA
  • Average cloud cover in August: 34

The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 31).

Average visibility in August
New Castle, VA

Average visibility in August - New Castle, VA
  • Average visibility in August: 5mi

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

New Castle, Virginia, USA

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