September weather forecast
Carrboro, NC

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Weather in September

September, the first month of the autumn in Carrboro, is still a warm month, with an average temperature ranging between min 63.3°F (17.4°C) and max 82°F (27.8°C).

Temperature

Carrboro's transition into September involves a gentle shift in temperature, receding from a tropical 88°F (31.1°C) in August to a warm 82°F (27.8°C). Carrboro anticipates an average minimum temperature of 63.3°F (17.4°C) in the month of September.

Heat index

The heat index value for September is calculated to be a hot 87.8°F (31°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.
Heat index evaluations are typically in the context of light winds and shaded environments. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', shows a temperature sensation when both heat and moisture conditions are combined. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Carrboro, in September, during 11.4 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 130 rainfall days, and 14.21" (361mm) of precipitation is accumulated.

Snowfall

In Carrboro, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:48 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:01 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Ensure safety - Recommendations to avert sunburn are presented. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.

Frequently asked questions

What is the usual temperature for Carrboro in September?

In September, the average high-temperature and low-temperature are 82°F (27.8°C) and 63.3°F (17.4°C) respectively. In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in September?

The average relative humidity in September in Carrboro is 75%.

How many days does it rain in September?

In Carrboro, North Carolina, during September, the rain falls for 11.4 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Carrboro have in September?

In Carrboro, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:48 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 7:01 pm EDT.

How many hours of sunshine does Carrboro have in September?

In September, the average sunshine duration is 8.9h.

What is the UV index reading in September in Carrboro?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium hazard to health 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 September
Carrboro, NC

Average temperature in September - Carrboro, NC
  • Average high temperature in September: 82°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (47.7°F).

  • Average low temperature in September: 63.3°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (32°F).

Average pressure in September
Carrboro, NC

Average pressure in September - Carrboro, NC
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in September
Carrboro, NC

Average wind speed in September - Carrboro, NC
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in September
Carrboro, NC

Average humidity in September - Carrboro, NC
  • Average humidity in September: 75%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (71%).

Average rainfall in September
Carrboro, NC

Average rainfall in September - Carrboro, NC
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is October (0.83").

Average rainfall days in September
Carrboro, NC

Average rainfall days in September - Carrboro, NC
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is November (6.4 days).

Average snowfall in September
Carrboro, NC

Average snowfall in September - Carrboro, NC
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Carrboro, NC

Average snowfall days in September - Carrboro, NC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Carrboro, NC

Average daylight in September / Average sunshine in September - Carrboro, NC
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in September
Carrboro, NC

Average sunshine days in September - Carrboro, NC
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is October (22.3 days).
The months with the least sunshine days are July and August (12.8 days).

Average UV index in September
Carrboro, NC

Average UV index in September - Carrboro, NC
  • Average UV index in September: 5

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

Average cloud cover in September
Carrboro, NC

Average cloud cover in September - Carrboro, NC
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in September
Carrboro, NC

Average visibility in September - Carrboro, NC
  • Average visibility in September: 6mi

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

Carrboro, North Carolina, USA

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