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

September weather forecast and climate
Charlotte, NC

A small river flowing through the beautiful Marshall Park overlooking Charlotte city buildings, North Carolina
A small river flowing through the beautiful Marshall Park overlooking Charlotte city buildings, North Carolina
The first month of the autumn, September, is also a moderately hot month in Charlotte, North Carolina, with temperature in the range of an average low of 63.7°F (17.6°C) and an average high of 82.9°F (28.3°C).

Temperature

In September, the average high-temperature marginally drops, from a tropical 88.7°F (31.5°C) in August, to a moderately hot 82.9°F (28.3°C). The average low-temperature, in September, is 63.7°F (17.6°C).

Heat index

In September, the average heat index is calculated to a tropical 88.9°F (31.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
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 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like wind, clothing, pregnancy, and activity influence one's weather impression. 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 especially crucial for babies and toddlers. 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.

Humidity

In September, the average relative humidity in Charlotte, North Carolina, is 72%.

Rainfall

In Charlotte, during 11.8 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, in Charlotte, there are 145.8 rainfall days, and 20.47" (520mm) of precipitation is accumulated.

Snowfall

In Charlotte snow does not fall in April through November.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index in Charlotte is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Charlotte?

In Charlotte, in September, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 63.7°F (17.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in September is evaluated at 88.9°F (31.6°C).

What is the average humidity in September in Charlotte?

In Charlotte, North Carolina, the average relative humidity in September is 72%.

How many days does it rain in September in Charlotte?

In September, the rain falls for 11.8 days. Throughout September, 1.5" (38mm) of precipitation is accumulated.

When it does not snow in Charlotte?

In Charlotte snow does not fall in April through November.

What is the average length of the day in September in Charlotte?

In Charlotte, the average length of the day in September is 12.4h.

How long on average sun shines in September in Charlotte?

In September, the average sunshine in Charlotte is 8.8h.

What is the UV index reading in September in Charlotte?

In September, the average daily maximum UV index in Charlotte, North Carolina, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Charlotte, NC
  • Average high temperature in September: 82.9°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 63.7°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

Average humidity in September - Charlotte, NC
  • Average humidity in September: 72%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (69%).

Average rainfall in September - Charlotte, NC
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is August (2.6").
The driest month (with the lowest rainfall) is October (1.3").

Average rainfall days in September - Charlotte, NC
  • Average rainfall days in September: 11.8 days

Months with the highest number of rainy days are July and August (16.9 days).
The month with the lowest number of rainy days is November (7.8 days).

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

The month with the highest snowfall is December (0.79").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

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

The month with the highest number of snowfall days is February (1.7 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in September / Average sunshine in September - Charlotte, NC
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 8.8h

The month with most sunshine is July (Average sunshine: 10.9h).
The month with least sunshine is December (Average sunshine: 5.4h).

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

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