Castalia
North Carolina, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Castalia, NC

The last month of the summer, August, is also a hot month in Castalia, North Carolina, with temperature in the range of an average low of 69.1°F (20.6°C) and an average high of 86.5°F (30.3°C).

Temperature

In Castalia, the average high-temperature in August is almost the same as in July - a still tropical 86.5°F (30.3°C). In Castalia, North Carolina, in August, the average low-temperature is 69.1°F (20.6°C).

Heat index

The average heat index is calculated to a torrid 99.3°F (37.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in August is 76%.

Rainfall

August is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.94" (100mm) of precipitation.

Snowfall

In Castalia snow does not fall in April through November.

Daylight

In Castalia, the average length of the day in August is 13.5h.

Sunshine

In August, the average sunshine is 10.1h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in August in Castalia?

The average high-temperature, in August, is 86.5°F (30.3°C), while the average low-temperature is 69.1°F (20.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, in August is evaluated at 99.3°F (37.4°C).

What is the average humidity in August in Castalia?

In Castalia, North Carolina, the average relative humidity in August is 76%.

How much does it rain in Castalia in August?

In August, the rain falls for 17.8 days. Throughout August, 3.94" (100mm) of precipitation is accumulated.

What is the rainiest month in Castalia?

The month with the most rainfall is August when the rain falls for 17.8 days and typically aggregates up to 3.94" (100mm) of precipitation.

When it does not snow in Castalia?

April through November are months without snowfall in Castalia.

How many hours of daylight does Castalia have in August?

In Castalia, the average length of the day in August is 13.5h.

How many hours of sunshine does Castalia have in August?

In Castalia, the average sunshine in August is 10.1h.

What is the month with the highest UV index in Castalia?

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

What is the UV index intensity in August in Castalia?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in August - Castalia, NC
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (47.7°F).

  • Average low temperature in August: 69.1°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).

Average humidity in August - Castalia, NC
  • Average humidity in August: 76%

The month with the highest relative humidity is September (78%).
Months with the lowest relative humidity are January, March, April and November (74%).

Average rainfall in August - Castalia, NC
  • Average rainfall in August: 3.94"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the lowest rainfall) is October (2.13").

Average rainfall days in August - Castalia, NC
  • Average rainfall days in August: 17.8 days

The month with the highest number of rainy days is July (18.7 days).
The month with the lowest number of rainy days is November (8.6 days).

Average snowfall in August - Castalia, NC
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.54").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in August - Castalia, NC
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in August / Average sunshine in August - Castalia, NC
  • Average daylight in August: 13.5h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in August: 10.1h

The month with most sunshine is June (Average sunshine: 10.6h).
The month with least sunshine is December (Average sunshine: 5.4h).

Average UV index in August - Castalia, NC
  • Average UV index in August: 6

Months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).