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
In Mount Holly, the average high-temperature in September slightly decreases from 93.4°F (34.1°C) in August to a still hot 87.3°F (30.7°C). In September, the average low-temperature is a comfortable 65.8°F (18.8°C).Heat index
The heat index in September is evaluated at a sweltering 98.6°F (37°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.
Humidity
The months with the lowest humidity are July through October, with an average relative humidity of 71%.Rainfall
In Mount Holly, in September, during 12.5 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. Throughout the year, there are 146.4 rainfall days, and 32.87" (835mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall in Mount Holly.Daylight
In Mount Holly, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In Mount Holly, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What are the least humid months?
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 Mount Holly have in September?
What time are sunrise and sunset in September in Mount Holly?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Mount Holly, AR
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is January (52°F).
- Average low temperature in September: 65.8°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in September
Mount Holly, AR
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Mount Holly, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Mount Holly, AR
- Average humidity in September: 71%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are July, August, September and October (71%).
Average rainfall in September
Mount Holly, AR
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is November (2.05").
Average rainfall days in September
Mount Holly, AR
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is August (15.4 days).
The month with the least rainy days is October (9 days).
Average snowfall in September
Mount Holly, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Mount Holly, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1 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
Mount Holly, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Mount Holly, AR
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is August (13.6 days).
Average UV index in September
Mount Holly, AR
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Mount Holly, AR
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in September
Mount Holly, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Mount Holly, Arkansas, USA
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