August weather forecastCastle Shannon, PA
August
Weather in August
The last month of the summer, August, is another warm month in Castle Shannon, Pennsylvania, with an average temperature ranging between max 82.2°F (27.9°C) and min 61.2°F (16.2°C).Temperature
Castle Shannon marks the start of August with an average high-temperature of a still moderately hot 82.2°F (27.9°C), hinting at a slight fluctuation from July's 83.8°F (28.8°C). Throughout August, Castle Shannon witnesses a consistent average low-temperature of 61.2°F (16.2°C).Heat index
The heat index in August is calculated to be a tropical 87.8°F (31°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Heat index determinations are made taking into account the shade and light air movements. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
August is the least humid month, with an average relative humidity of 73%.Rainfall
In August, the rain falls for 16.3 days. Throughout August, 1.97" (50mm) of precipitation is accumulated. In Castle Shannon, during the entire year, the rain falls for 164 days and collects up to 26.89" (683mm) of precipitation.Snowfall
In Castle Shannon, snow does not fall in May through September.Daylight
In Castle Shannon, the average length of the day in August is 13h and 43min.On the first day of August, sunrise is at 6:18 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 7:53 pm EDT.
Sunshine
August has the most sunshine of the year, with an average of 10.1h of sunshine.UV index
The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 5 during August morphs into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Castle Shannon, PA
- Average high temperature in August: 82.2°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 (33.4°F).
- Average low temperature in August: 61.2°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in August
Castle Shannon, PA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in August
Castle Shannon, PA
- Average wind speed in August: 4.7mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in August
Castle Shannon, PA
- Average humidity in August: 73%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (73%).
Average rainfall in August
Castle Shannon, PA
- Average rainfall in August: 1.97"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in August
Castle Shannon, PA
- Average rainfall days in August: 16.3 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in August
Castle Shannon, PA
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Castle Shannon, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (16.3 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
Castle Shannon, PA
- Average daylight in August: 13h and 42min
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 24min).
- Average sunshine in August: 10h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in August
Castle Shannon, PA
- Average sunshine days in August: 13 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (9.5 days).
Average UV index in August
Castle Shannon, PA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Castle Shannon, PA
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in August
Castle Shannon, PA
- Average visibility in August: 6mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
