September weather forecast and climate
Raleigh, NC

A view of the George Washington statue overlooking the city buildings of Raleigh, North Carolina
A view of the George Washington statue overlooking the city buildings of Raleigh, North Carolina
September is the beginning of the temperate fall season in Raleigh that gradually brings down the summer heat. The average temperatures are in the comfortable zone of 62°F (16.7°C) to 82°F (27.8°C) with daily sunlight of 7.3 hours.
September marks an uptick in rainfall with the rain gauge registering 4.3" (109.2mm) as hurricanes occasionally breach the city limits. The skies are occasionally cloudy with moderate wind speeds below 10 miles per hour except during stormy conditions.
Warm summer clothing works typically best in September in Raleigh. Keep an eye on the weather forecast!

What is the temperature in September in Raleigh?

In September, in Raleigh, North Carolina, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 61.7°F (16.5°C).

What is the average humidity in September in Raleigh?

The average relative humidity in September in Raleigh, North Carolina, is 77.1%.

How much does it rain in Raleigh in September?

In Raleigh, North Carolina, during September, the rain falls for 8 days and regularly aggregates up to 4.4" (110.7mm) of precipitation.

How many hours of daylight does Raleigh have in September?

The average length of the day in September in Raleigh, North Carolina, is 12.4h.

How long on average sun shines in September in Raleigh?

In September, the average sunshine in Raleigh is 7.3h.

What is the UV index intensity in September in Raleigh?

The average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Raleigh, NC
  • Average high temperature in September: 82.1°F

The warmest month (with the highest average high temperature) is July (90.2°F).
The month with the lowest average high temperature is January (50.9°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (69.9°F).
The coldest month (with the lowest average low temperature) is January (31°F).

Average humidity in September - Raleigh, NC
  • Average humidity in September: 77.1%

The month with the highest relative humidity is August (77.9%).
The month with the lowest relative humidity is April (61.7%).

Average rainfall in September - Raleigh, NC
  • Average rainfall in September: 4.4"

The wettest month (with the highest rainfall) is July (4.7").
The driest month (with the lowest rainfall) is April (2.9").

Average rainfall days in September - Raleigh, NC
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is July (11.9 days).
The month with the lowest number of rainy days is October (7.3 days).

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

The month with the highest snowfall is January (2.9").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is February (1.3 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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

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

  • Average sunshine in September: 7.3h

The month with most sunshine is June (Average sunshine: 8.9h).
The month with least sunshine is December (Average sunshine: 5.1h).

Average UV index in September - Raleigh, NC
  • Average UV index in September: 8

Months with the highest UV index are June and July (UV index 10).
The month with the lowest UV index is December (UV index 2).

deutscheenglishespañolрусский中文