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 into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a tropical 88.5°F (31.4°C) in August to a moderately hot 82.9°F (28.3°C). An average low-temperature of 63.5°F (17.5°C) marks the month of September.Heat index
September's mean heat index is computed to be a tropical 89.6°F (32°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Always consider that heat index estimations are for light winds and places in the shade. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In September, the average relative humidity is 73%.Rainfall
In Mount Holly, in September, during 12.6 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. In Mount Holly, during the entire year, the rain falls for 155.8 days and collects up to 30.98" (787mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September in Mount Holly, North Carolina, is 12h and 23min.On the first day of September, sunrise is at 6:57 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm EDT.
Sunshine
In September, the average sunshine in Mount Holly is 8.7h.UV index
The average daily maximum UV index in September in Mount Holly is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
Is it hot in Mount Holly during September?
What is the average humidity in September in Mount Holly?
How many days does it rain in September in Mount Holly?
When it does not snow in Mount Holly?
What is the average length of the day in September in Mount Holly?
When is the sunrise / sunset in September in Mount Holly?
How many hours of sunshine does Mount Holly have in September?
How high is the UV index in September in Mount Holly?
Average temperature in September
Mount Holly, NC
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in September
Mount Holly, NC
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Mount Holly, NC
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Mount Holly, NC
- Average humidity in September: 73%
The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June and July (70%).
Average rainfall in September
Mount Holly, NC
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is October (1.97").
Average rainfall days in September
Mount Holly, NC
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Mount Holly, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.97").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Mount Holly, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Mount Holly, 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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Mount Holly, NC
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Mount Holly, NC
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Mount Holly, NC
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Mount Holly, 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).
Mount Holly, North Carolina, USA
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