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
September signifies a gentle decline in Arkadelphia's average high-temperature, easing from a hot 92.8°F (33.8°C) in August to a still tropical 86.7°F (30.4°C). Arkadelphia sees a major change from daytime highs, with the nighttime temperature dipping to a comfortable 64.9°F (18.3°C) on average during September.Heat index
In September, the heat index is calculated to be a very hot 96.8°F (36°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.Always consider that heat index estimations are for light winds and places in the shade. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
July through October, with an average relative humidity of 71%, are the least humid months.Rainfall
The month with the least rainfall in Arkadelphia is September, when the rain falls for 10.6 days and typically collects 1.14" (29mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 6:46 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:57 pm CDT.
Sunshine
In Arkadelphia, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury 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. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What are the least humid months?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Arkadelphia?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Arkadelphia?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Arkadelphia, AR
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (50.5°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Arkadelphia, AR
- Average pressure in September: 30"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
Arkadelphia, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Arkadelphia, AR
- Average humidity in September: 71%
The months with the highest relative humidity are February, March and December (80%).
The months with the lowest relative humidity are July, August, September and October (71%).
Average rainfall in September
Arkadelphia, AR
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Arkadelphia, AR
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is August (14.3 days).
The month with the least rainy days is October (7.9 days).
Average snowfall in September
Arkadelphia, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Arkadelphia, AR
- 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 and October (0 days).
Average daylight in September /
Average sunshine in September
Arkadelphia, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Arkadelphia, AR
- Average sunshine days in September: 17 days
The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is August (13.8 days).
Average UV index in September
Arkadelphia, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Arkadelphia, AR
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Arkadelphia, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
Arkadelphia, Arkansas, USA
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