September weather forecastHarrell, AR
September
Weather in September
September, the first month of the autumn in Harrell, is also a hot month, with an average temperature fluctuating between 65.8°F (18.8°C) and 87.1°F (30.6°C).Temperature
Harrell records a mild change in average high-temperature during September, easing from 92.8°F (33.8°C) in August to a still hot 87.1°F (30.6°C). Harrell, during September, witnesses an average low-temperature of 65.8°F (18.8°C).Heat index
The heat index value for September is evaluated at a fiery hot 98.6°F (37°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
In September, the average relative humidity is 72%.Rainfall
In Harrell, during September, the rain falls for 11.9 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Harrell, during the entire year, the rain falls for 141.7 days and collects up to 24.57" (624mm) of precipitation.Snowfall
In Harrell, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:54 pm CDT.
Sunshine
In Harrell, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 6 during September translates into the following guidance:
Ward off overexposure. Defence against solar harm is crucial. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harrell, AR
- Average high temperature in September: 87.1°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 (51.6°F).
- Average low temperature in September: 65.8°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Harrell, 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
Harrell, AR
- 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 (4.8mph).
Average humidity in September
Harrell, AR
- Average humidity in September: 72%
The months with the highest relative humidity are February, March and December (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Harrell, AR
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is April (2.6").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in September
Harrell, AR
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is August (15.8 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Harrell, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Harrell, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.5 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
Harrell, AR
- Average daylight in September: 12h and 24min
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 30min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Harrell, AR
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is October (21.2 days).
The month with the least sunshine days is August (12.4 days).
Average UV index in September
Harrell, 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
Harrell, AR
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in September
Harrell, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
