September weather forecast
Knightdale, NC

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Weather in September

The first month of the autumn, September, is still a warm month in Knightdale, North Carolina, with an average temperature fluctuating between 64°F (17.8°C) and 81.5°F (27.5°C).

Temperature

Knightdale records an average high-temperature of a moderately hot 81.5°F (27.5°C) in September, closely mirroring the climate of the previous month. In Knightdale, September nights cool down to an average of 64°F (17.8°C).

Heat index

During September, the heat index is calculated to be a tropical 87.8°F (31°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

May, September and December, with an average relative humidity of 77%, are the most humid months in Knightdale, North Carolina.

Rainfall

In September, in Knightdale, North Carolina, the rain falls for 14.2 days. Throughout September, 2.83" (72mm) of precipitation is accumulated. In Knightdale, during the entire year, the rain falls for 168.7 days and collects up to 33.19" (843mm) of precipitation.

Snowfall

April through October are months without snowfall in Knightdale.

Daylight

The average length of the day in September in Knightdale is 12h and 23min.
On the first day of September, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:58 pm EDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In Knightdale, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What is the usual temperature for Knightdale in September?

An average high-temperature, in September, in Knightdale, is 81.5°F (27.5°C) and the average low-temperature is 64°F (17.8°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 87.8°F (31°C).

What is the most humid month in Knightdale?

May, September and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in September in Knightdale?

In Knightdale, North Carolina, the average relative humidity in September is 77%.

How many days does it rain in September in Knightdale?

In Knightdale, North Carolina, in September, it is raining for 14.2 days, with typically 2.83" (72mm) of accumulated precipitation.

When it does not snow in Knightdale?

April through October are months without snowfall in Knightdale, North Carolina.

How many hours of daylight does Knightdale have in September?

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

When is the sunrise / sunset in September in Knightdale?

On the first day of September in Knightdale, North Carolina, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:58 pm EDT.

How long on average sun shines in September in Knightdale?

In Knightdale, the average sunshine duration in September is 9.1h.

How high is the UV index in September in Knightdale?

In September, the average daily maximum UV index in Knightdale, North Carolina, is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
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
Knightdale, NC

Average temperature in September - Knightdale, NC
  • Average high temperature in September: 81.5°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (48°F).

  • Average low temperature in September: 64°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 (32.7°F).

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Average pressure in September
Knightdale, NC

Average pressure in September - Knightdale, 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).

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Average wind speed in September
Knightdale, NC

Average wind speed in September - Knightdale, NC
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is April (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in September
Knightdale, NC

Average humidity in September - Knightdale, NC
  • Average humidity in September: 77%

The months with the highest relative humidity are May, September and December (77%).
The months with the lowest relative humidity are January and November (73%).

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Average rainfall in September
Knightdale, NC

Average rainfall in September - Knightdale, NC
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is October (2.2").

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Average rainfall days in September
Knightdale, NC

Average rainfall days in September - Knightdale, NC
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.5 days).

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Average snowfall in September
Knightdale, NC

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

The month with the highest snowfall is January (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Knightdale, NC

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

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in September
Knightdale, NC

Average sunshine days in September - Knightdale, NC
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (9.7 days).

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Average UV index in September
Knightdale, NC

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

The 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).

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Average cloud cover in September
Knightdale, NC

Average cloud cover in September - Knightdale, NC
  • Average cloud cover in September: 36

The months with the most cloud cover are February and March (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 31).

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Average visibility in September
Knightdale, NC

Average visibility in September - Knightdale, 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).

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Knightdale, North Carolina, USA

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