September weather forecast and climate
Harkers Island, NC

Weather in September

The first month of the autumn, September, is also a moderately hot month in Harkers Island, North Carolina, with average temperature fluctuating between 79.7°F (26.5°C) and 74.3°F (23.5°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still moderately hot 79.7°F (26.5°C). The average low-temperature, in Harkers Island, is 74.3°F (23.5°C).

Humidity

In Harkers Island, the average relative humidity is 77%.

Rainfall

In Harkers Island, in September, during 17.5 rainfall days, 4.49" (114mm) of precipitation is typically accumulated. In Harkers Island, during the entire year, the rain falls for 181.4 days and collects up to 34.76" (883mm) of precipitation.

Snowfall

In Harkers Island snow does not fall in March through December.

Ocean temperature

In Harkers Island, the average seawater temperature is 80.8°F (27.1°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

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

Sunshine

The average sunshine in Harkers Island is 9.6h.

UV index

In Harkers Island, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in Harkers Island?

The average high-temperature, in September, in Harkers Island, is 79.7°F (26.5°C), while the average low-temperature is 74.3°F (23.5°C).

What is the average humidity in September in Harkers Island?

In Harkers Island, the average relative humidity in September is 77%.

How many days does it rain in September in Harkers Island?

In September, in Harkers Island, North Carolina, the rain falls for 17.5 days. Throughout September, 4.49" (114mm) of precipitation is accumulated.

When it does not snow in Harkers Island?

March through December are months without snowfall.

How warm is the water in September in Harkers Island?

In Harkers Island, North Carolina, in September, the average water temperature is 80.8°F (27.1°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Harkers Island?

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

How long on average sun shines in September in Harkers Island?

The average sunshine in September in Harkers Island, North Carolina, is 9.6h.

How high is the UV index in September in Harkers Island?

In Harkers Island, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.

Average temperature in September
Harkers Island, NC

Average temperature in September - Harkers Island, NC
  • Average high temperature in September: 79.7°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (44.6°F).

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Average pressure in September
Harkers Island, NC

Average pressure in September - Harkers Island, NC
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is December (30.12").
The month with the lowest atmospheric pressure is June (29.98").

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Average wind speed in September
Harkers Island, NC

Average wind speed in September - Harkers Island, NC
  • Average wind speed in September: 11.6mph

The windiest months (with the highest average wind speed) are February and March (14mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).

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Average humidity in September
Harkers Island, NC

Average humidity in September - Harkers Island, NC
  • Average humidity in September: 77%

Months with the highest relative humidity are May, June, July and August (78%).
Months with the lowest relative humidity are February, March and October (74%).

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Average rainfall in September
Harkers Island, NC

Average rainfall in September - Harkers Island, NC
  • Average rainfall in September: 4.49"

The wettest month (with the highest rainfall) is August (4.84").
The driest month (with the least rainfall) is January (1.3").

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Average rainfall days in September
Harkers Island, NC

Average rainfall days in September - Harkers Island, NC
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is August (22.3 days).
Months with the least rainy days are February and November (11.1 days).

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Average snowfall in September
Harkers Island, NC

Average snowfall in September - Harkers Island, NC
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.24").
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Harkers Island, NC

Average snowfall days in September - Harkers Island, NC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.6 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in September
Harkers Island, NC

Average sea temperature in September - Harkers Island, NC
  • Average sea temperature in September: 80.9°F

The best month for swimming (with the highest average sea temperature) is August (83.2°F).
The coldest month (with the lowest average sea temperature) is February (61.3°F).

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Average daylight in September /
Average sunshine in September
Harkers Island, NC

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

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.6h

The month with the most sunshine is June (Average sunshine: 10.9h).
Months with the least sunshine are January and December (Average sunshine: 5.5).

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Average sunshine days in September
Harkers Island, NC

Average sunshine days in September - Harkers Island, NC
  • Average sunshine days in September: 9.7 days

The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is August (5.9 days).

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Average UV index in September
Harkers Island, NC

Average UV index in September - Harkers Island, NC
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

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Average cloud cover in September
Harkers Island, NC

Average cloud cover in September - Harkers Island, NC
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

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Average visibility in September
Harkers Island, NC

Average visibility in September - Harkers Island, 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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