September weather forecast
Erwin, NC

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Weather in September

The first month of the autumn, September, is still a warm month in Erwin, North Carolina, with an average temperature varying between 81.9°F (27.7°C) and 64.9°F (18.3°C).

Temperature

September indicates a minor shift in the average high-temperature, from August's hot 87.3°F (30.7°C) to a warm 81.9°F (27.7°C). An average nighttime temperature of 64.9°F (18.3°C) is noted during the month of September.

Heat index

September's mean heat index is calculated to be a tropical 87.8°F (31°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
Realize that the values for the heat index are set for shaded places and light winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

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

Rainfall

In Erwin, in September, during 13.6 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. Throughout the year, in Erwin, there are 165.1 rainfall days, and 32.91" (836mm) of precipitation is accumulated.

Snowfall

In Erwin, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September in Erwin, North Carolina, sunrise is at 6:47 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:59 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In September, the average daily maximum UV index in Erwin is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
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Frequently asked questions

What is the usual temperature for Erwin in September?

The high-temperature in Erwin during September is 81.9°F (27.7°C) and the low-temperature is 64.9°F (18.3°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 87.8°F (31°C).

What are the most humid months in Erwin?

The months with the highest humidity in Erwin are May, August and September, with an average relative humidity of 77%.

What is the average humidity in September in Erwin?

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

How much does it rain in Erwin in September?

In Erwin, North Carolina, during September, the rain falls for 13.6 days and regularly aggregates up to 3.23" (82mm) of precipitation.

When it does not snow in Erwin?

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

How many hours of daylight does Erwin have in September?

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

When are sunrise and sunset in September in Erwin?

On the first day of September in Erwin, North Carolina, sunrise is at 6:47 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:59 pm EDT.

How long on average sun shines in September in Erwin?

The average sunshine duration in September in Erwin, North Carolina, is 9.1h.

What is the UV index intensity in September in Erwin?

In Erwin, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from 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
Erwin, NC

Average temperature in September - Erwin, NC
  • Average high temperature in September: 81.9°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 64.9°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

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Average pressure in September
Erwin, NC

Average pressure in September - Erwin, NC
  • Average pressure in September: 30.02"Hg

The months with the highest atmospheric pressure are November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Erwin, NC

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

The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Erwin, NC

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

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

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Average rainfall in September
Erwin, NC

Average rainfall in September - Erwin, NC
  • Average rainfall in September: 3.23"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days in September
Erwin, NC

Average rainfall days in September - Erwin, NC
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is November (9.2 days).

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Average snowfall in September
Erwin, NC

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

The month with the highest snowfall is February (0.91").
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
Erwin, NC

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

The month with the highest number of snowfall days is January (1.4 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
Erwin, NC

Average daylight in September / Average sunshine in September - Erwin, 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 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
Erwin, NC

Average sunshine days in September - Erwin, NC
  • Average sunshine days in September: 14.8 days

The months with the most sunshine days are October and November (19.5 days).
The month with the least sunshine days is July (10.3 days).

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Average UV index in September
Erwin, NC

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

The month with the highest UV index is 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
Erwin, NC

Average cloud cover in September - Erwin, NC
  • Average cloud cover in September: 35

The month with the most cloud cover is February (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
Erwin, NC

Average visibility in September - Erwin, 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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Erwin, North Carolina, USA

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