Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a tropical 87.3°F (30.7°C) in August to a warm 81.9°F (27.7°C). During September, Erwin witnesses a consistent average low-temperature of 64.9°F (18.3°C).Heat index
The heat index in September is computed to be a hot 87.8°F (31°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
May, August and September, with an average relative humidity of 77%, are the most humid months.Rainfall
In Erwin, during September, the rain falls for 13.6 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, 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
The average length of the day in September is 12h and 23min.On the first day of September, 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
The average sunshine in September in Erwin is 9.1h.UV index
In Erwin, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the most humid month?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Erwin have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Erwin, North Carolina, USA
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