September weather forecast and climate
Gretna Green, NC

Weather in September

The first month of the autumn, September, is also a moderately hot month in Gretna Green, North Carolina, with temperature in the range of an average low of 63.5°F (17.5°C) and an average high of 81.1°F (27.3°C).

Temperature

In Gretna Green, North Carolina, the average high-temperature in September marginally drops, from a hot 86.7°F (30.4°C) in August, to a warm 81.1°F (27.3°C). In September, the average low-temperature is 63.5°F (17.5°C).

Heat index

The average heat index in September is evaluated at a tropical 86.2°F (30.1°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like differences in body mass, height, and shape, wind, 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

The average relative humidity in Gretna Green is 77%.

Rainfall

In Gretna Green, it is raining for 12.5 days, with typically 2.01" (51mm) of accumulated precipitation. In Gretna Green, during the entire year, the rain falls for 156.2 days and collects up to 27.6" (701mm) of precipitation.

Snowfall

April through October are months without snowfall in Gretna Green.

Daylight

The average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 8.9h.

UV index

In Gretna Green, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected 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. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Gretna Green?

The average high-temperature, in September, in Gretna Green, is 81.1°F (27.3°C), while the average low-temperature is 63.5°F (17.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in September is evaluated at 86.2°F (30.1°C).

What is the average humidity in September in Gretna Green?

The average relative humidity in September in Gretna Green, North Carolina, is 77%.

How much does it rain in Gretna Green in September?

In Gretna Green, North Carolina, in September, it is raining for 12.5 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow in Gretna Green?

In Gretna Green, North Carolina, snow does not fall in April through October.

What is the average length of the day in September in Gretna Green?

In Gretna Green, North Carolina, the average length of the day in September is 12.4h.

How long on average sun shines in September in Gretna Green?

The average sunshine in September in Gretna Green, North Carolina, is 8.9h.

How high is the UV index in September in Gretna Green?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Gretna Green, NC

Average temperature in September - Gretna Green, NC
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (46.8°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).

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Average pressure in September
Gretna Green, NC

Average pressure in September - Gretna Green, NC
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.96").

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Average wind speed in September
Gretna Green, NC

Average wind speed in September - Gretna Green, NC
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Gretna Green, NC

Average humidity in September - Gretna Green, NC
  • Average humidity in September: 77%

The month with the highest relative humidity is May (79%).
Months with the lowest relative humidity are January, April, July and November (74%).

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Average rainfall in September
Gretna Green, NC

Average rainfall in September - Gretna Green, NC
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is August (3.07").
The driest month (with the least rainfall) is October (1.85").

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Average rainfall days in September
Gretna Green, NC

Average rainfall days in September - Gretna Green, NC
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.3 days).

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Average snowfall in September
Gretna Green, NC

Average snowfall in September - Gretna Green, NC
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.3").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Gretna Green, NC

Average snowfall days in September - Gretna Green, NC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.6 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Gretna Green, NC

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

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 8.9h

Months with the most sunshine are June and July (Average sunshine: 10.7h).
Months with the least sunshine are January and December (Average sunshine: 5.5).

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Average sunshine days in September
Gretna Green, NC

Average sunshine days in September - Gretna Green, NC
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in September
Gretna Green, NC

Average UV index in September - Gretna Green, NC
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).

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Average cloud cover in September
Gretna Green, NC

Average cloud cover in September - Gretna Green, NC
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 44).
Months with the least cloud cover are June and July (Cloud cover 31).

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Average visibility in September
Gretna Green, NC

Average visibility in September - Gretna Green, NC
  • Average visibility in September: 6mi

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

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