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 transition to September results in a modest reduction in average high-temperature, moving from a hot 86.7°F (30.4°C) in August to a moderately hot 81°F (27.2°C). The nights of September anticipate an average low-temperature of 64°F (17.8°C).Heat index
September's mean heat index is computed to be a tropical 86°F (30°C). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humidity
In September, the average relative humidity is 78%.Rainfall
In Harrellsville, in September, during 13.7 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Harrellsville, during the entire year, the rain falls for 161.4 days and collects up to 31.22" (793mm) of precipitation.Snowfall
In Harrellsville, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:51 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
In Harrellsville, 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 exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Harrellsville have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Harrellsville have in September?
How high is the UV index in September in Harrellsville?
Average temperature in September
Harrellsville, NC
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (47.3°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in September
Harrellsville, NC
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Harrellsville, 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 (5.6mph).
Average humidity in September
Harrellsville, NC
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January, February, April and November (75%).
Average rainfall in September
Harrellsville, NC
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is October (2.09").
Average rainfall days in September
Harrellsville, NC
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Harrellsville, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Harrellsville, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.3 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
Harrellsville, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Harrellsville, NC
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in September
Harrellsville, NC
- Average UV index in September: 5
The 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).
Average cloud cover in September
Harrellsville, NC
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 32).
Average visibility in September
Harrellsville, NC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Harrellsville, North Carolina, USA
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