August weather forecast
New Castle, PA

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Weather in August

August brings a subtle decrease in temperature, signaling the nearing end of summer. While the descent from July's peak of 82°F (27.8°C) to 80.6°F (27°C) in this month is only slight, it indicates the gradual transition to the cooler months. Sunshine continues to dominate the days, providing residents with plenty of opportunities for outdoor activities. Thanks to the warmth and clear skies, August is a favorable time for water sports and late summer festivals.

Temperature

August's onset records an average high-temperature of a still moderately hot 80.6°F (27°C), a near match to July's 82°F (27.8°C). During August, New Castle detects a significant contrast from its daytime temperatures, with nights averaging at a mild 59°F (15°C).

Heat index

The heat index value for August is calculated to be a hot 86°F (30°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.

Humidity

The months with the lowest humidity are April through August, with an average relative humidity of 78%.

Rainfall

In New Castle, in August, it is raining for 16.3 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, there are 177.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Snowfall

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

Daylight

In New Castle, the average length of the day in August is 13h and 46min.
On the first day of August, sunrise is at 6:18 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 7:55 pm EDT.

Sunshine

August has the most sunshine of the year, with an average of 10h of sunshine.

UV index

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 5 translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Frequently asked questions

What are the temperatures in August?

August temperatures vary between a high-temperature of 80.6°F (27°C) and a low-temperature of 59°F (15°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 86°F (30°C).

What is the least humid month?

April through August, with an average relative humidity of 78%, are the least humid months.

What is the average humidity in August?

The average relative humidity in August is 78%.

How many days does it rain in August?

In New Castle, in August, it is raining for 16.3 days, with typically 2.48" (63mm) of accumulated precipitation.

When it does not snow?

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

What is the average length of the day in August?

In New Castle, the average day length in August is 13h and 46min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:18 am and sunset at 8:37 pm. On the last day of the month, in New Castle, sunrise is at 6:47 am and sunset at 7:55 pm EDT.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10h of sunshine.

How long on average sun shines in August?

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

How high is the UV index in August?

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
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, PA

Average temperature in August - New Castle, PA
  • Average high temperature in August: 80.6°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in August: 59°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in August
New Castle, PA

Average pressure in August - New Castle, PA
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in August
New Castle, PA

Average wind speed in August - New Castle, PA
  • Average wind speed in August: 5.2mph

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

Average humidity in August
New Castle, PA

Average humidity in August - New Castle, PA
  • Average humidity in August: 78%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).

Average rainfall in August
New Castle, PA

Average rainfall in August - New Castle, PA
  • Average rainfall in August: 2.48"

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in August
New Castle, PA

Average rainfall days in August - New Castle, PA
  • Average rainfall days in August: 16.3 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in August
New Castle, PA

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

The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
New Castle, PA

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

The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - New Castle, PA
  • 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 0min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

Average sunshine days in August
New Castle, PA

Average sunshine days in August - New Castle, PA
  • Average sunshine days in August: 12.8 days

The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (7 days).

Average UV index in August
New Castle, PA

Average UV index in August - New Castle, PA
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
New Castle, PA

Average cloud cover in August - New Castle, PA
  • Average cloud cover in August: 36

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in August
New Castle, PA

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

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February and December (4mi).

New Castle, Pennsylvania, USA

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