September weather forecast
Half Moon, NC

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Weather in September

September, the first month of the autumn in Half Moon, is still a warm month, with an average temperature ranging between min 67.6°F (19.8°C) and max 82.8°F (28.2°C).

Temperature

In September, Half Moon experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 87.4°F (30.8°C) in August to a warm 82.8°F (28.2°C). During the nights in September, an average low-temperature of 67.6°F (19.8°C) is observed.

Heat index

During September, the heat index is estimated at a hot 89.6°F (32°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.

Humidity

August, September and December, with an average relative humidity of 78%, are the most humid months in Half Moon.

Rainfall

In Half Moon, in September, it is raining for 10.8 days, with typically 1.61" (41mm) of accumulated precipitation. In Half Moon, during the entire year, the rain falls for 125.9 days and collects up to 13.46" (342mm) of precipitation.

Snowfall

In Half Moon, snow does not fall in March through October.

Daylight

In September, the average length of the day in Half Moon is 12h and 23min.
On the first day of September in Half Moon, sunrise is at 6:43 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm EDT.

Sunshine

In Half Moon, North Carolina, the average sunshine in September is 9.3h.

UV index

In Half Moon, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 6 in September leads to these recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

How hot is September in Half Moon?

The high-temperature in Half Moon during September is 82.8°F (28.2°C) and the low-temperature is 67.6°F (19.8°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 89.6°F (32°C).

What are the most humid months in Half Moon?

August, September and December, with an average relative humidity of 78%, are most humid months in Half Moon.

What is the average humidity in September in Half Moon?

In September, the average relative humidity in Half Moon is 78%.

How many days does it rain in September in Half Moon?

In Half Moon, in September, it is raining for 10.8 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in Half Moon?

March through October are months without snowfall.

What is the average length of the day in September in Half Moon?

The average day length in September is 12h and 23min.

When are sunrise and sunset in September in Half Moon?

In September, on the first day of the month, sunrise is at 6:43 am and sunset at 7:35 pm. On the last day of the month, in Half Moon, North Carolina, sunrise is at 7:04 am and sunset at 6:54 pm EDT.

How long on average sun shines in September in Half Moon?

In September, the average sunshine duration in Half Moon is 9.3h.

How high is the UV index in September in Half Moon?

In Half Moon, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe 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
Half Moon, NC

Average temperature in September - Half Moon, NC
  • Average high temperature in September: 82.8°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in September: 67.6°F

The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (36.7°F).

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Average pressure in September
Half Moon, NC

Average pressure in September - Half Moon, NC
  • Average pressure in September: 30.01"Hg

The months with the highest atmospheric pressure are January, November and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in September
Half Moon, NC

Average wind speed in September - Half Moon, NC
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in September
Half Moon, NC

Average humidity in September - Half Moon, NC
  • Average humidity in September: 78%

The months with the highest relative humidity are August, September and December (78%).
The months with the lowest relative humidity are March and April (73%).

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Average rainfall in September
Half Moon, NC

Average rainfall in September - Half Moon, NC
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in September
Half Moon, NC

Average rainfall days in September - Half Moon, NC
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is July (15.7 days).
The months with the least rainy days are January and November (6.8 days).

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Average snowfall in September
Half Moon, NC

Average snowfall in September - Half Moon, NC
  • Average snowfall in September: 0"

The months with the highest snowfall are January, February, November and December (0.04").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

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Average snowfall days in September
Half Moon, NC

Average snowfall days in September - Half Moon, NC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.5 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
Half Moon, NC

Average daylight in September / Average sunshine in September - Half Moon, 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 54min).

  • Average sunshine in September: 9h and 2min

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

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Average sunshine days in September
Half Moon, NC

Average sunshine days in September - Half Moon, NC
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in September
Half Moon, NC

Average UV index in September - Half Moon, NC
  • Average UV index in September: 6

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Half Moon, NC

Average cloud cover in September - Half Moon, NC
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in September
Half Moon, NC

Average visibility in September - Half Moon, 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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Half Moon, North Carolina, USA

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