September weather forecastDardanelle, AR
September
Weather in September
The first month of the autumn, September, is still a warm month in Dardanelle, Arkansas, with an average temperature ranging between max 83.8°F (28.8°C) and min 61.7°F (16.5°C).Temperature
In the transition to September, Dardanelle observes a minor drop in the average high-temperature, shifting from a tropical 90.5°F (32.5°C) in August to a moderately hot 83.8°F (28.8°C). Despite the stark contrast with daytime temperatures, Dardanelle's September nights average at a refreshing 61.7°F (16.5°C).Heat index
The average heat index in September is appraised at a hot 91.4°F (33°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In September, the average relative humidity is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Dardanelle, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dardanelle, AR
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (47.5°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in September
Dardanelle, AR
- Average pressure in September: 30.01"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
Dardanelle, AR
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Dardanelle, AR
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The months with the lowest relative humidity are July, August and October (73%).
Average rainfall in September
Dardanelle, AR
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (4.84").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Dardanelle, AR
- Average rainfall days in September: 12.9 days
The months with the highest number of rainy days are May and July (16.3 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in September
Dardanelle, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Dardanelle, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Dardanelle, AR
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 24min).
Average sunshine days in September
Dardanelle, AR
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Dardanelle, AR
- Average UV index in September: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Dardanelle, AR
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 45).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in September
Dardanelle, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March, April, May and December (5mi).
