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

August weather forecast and climate
Raleigh, NC

August, the last month of the summer, in Raleigh, is also a hot month, with temperature in the range of an average low of 69.4°F (20.8°C) and an average high of 87.3°F (30.7°C).

Temperature

In Raleigh, the average high-temperature in August is relatively the same as in July - a still tropical 87.3°F (30.7°C). In Raleigh, in August, the average low-temperature is 69.4°F (20.8°C).

Heat index

The average heat index is calculated to a sweltering 100.9°F (38.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, clothing, metabolic differences). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Raleigh, North Carolina, the average relative humidity in August is 75%.

Rainfall

August is the month with the most rainfall in Raleigh. Rain falls for 18 days and accumulates 3.43" (87mm) of precipitation.

Snowfall

April through October are months without snowfall in Raleigh.

Daylight

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

Sunshine

In Raleigh, the average sunshine in August is 10.3h.

UV index

In Raleigh, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Raleigh?

The average high-temperature, in August, in Raleigh, is 87.3°F (30.7°C), while the average low-temperature is 69.4°F (20.8°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, is calculated to 100.9°F (38.3°C).

What is the average humidity in August in Raleigh?

In Raleigh, North Carolina, the average relative humidity in August is 75%.

How many days does it rain in August in Raleigh?

In August, in Raleigh, the rain falls for 18 days. Throughout August, 3.43" (87mm) of precipitation is accumulated.

What is the rainiest month in Raleigh?

The month with the most rainfall is August when the rain falls for 18 days and typically aggregates up to 3.43" (87mm) of precipitation.

When it does not snow in Raleigh?

In Raleigh, North Carolina, snow does not fall in April through October.

What is the average length of the day in August in Raleigh?

The average length of the day in August in Raleigh, North Carolina, is 13.5h.

How many hours of sunshine does Raleigh have in August?

In Raleigh, North Carolina, the average sunshine in August is 10.3h.

How high is the UV index in August in Raleigh?

In Raleigh, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Raleigh, NC
  • Average high temperature in August: 30.7°C

The warmest month (with the highest average high temperature) is July (31.9°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in August: 20.8°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (0.5°C).

Average humidity in August - Raleigh, NC
  • Average humidity in August: 75%

Months with the highest relative humidity are May, September and December (76%).
Months with the lowest relative humidity are January, March, April, June, July and November (73%).

Average rainfall in August - Raleigh, NC
  • Average rainfall in August: 87mm

The wettest month (with the highest rainfall) is August (87mm).
The driest month (with the least rainfall) is October (54mm).

Average rainfall days in August - Raleigh, NC
  • Average rainfall days in August: 18 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is November (9.1 days).

Average snowfall in August - Raleigh, NC
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (37mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is February (2.1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in August: 10.3h

Months with the most sunshine are June and July (Average sunshine: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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

Months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).