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
Harrell's weather subtly changes with the onset of September, barely falling from a hot 92.8°F (33.8°C) in August to a still tropical 87.1°F (30.6°C). Harrell observes an average low-temperature of 65.8°F (18.8°C) during September nights.Heat index
September's mean heat index is computed to be a very hot 98.6°F (37°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.Heat index's context suggests values are appropriate for shady areas and slight breezes. 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', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
The average relative humidity in September is 72%.Rainfall
In Harrell, in September, during 11.9 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. 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 September in Harrell, Arkansas, sunrise is at 6:44 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:54 pm CDT.
Sunshine
The average sunshine in September in Harrell is 9.5h.UV index
In September, the average daily maximum UV index in Harrell, Arkansas, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. 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. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
Is it hot in Harrell during September?
What is the average humidity in September in Harrell?
How much does it rain in Harrell in September?
When it does not snow in Harrell?
What is the average length of the day in September in Harrell?
What time are sunrise and sunset in September in Harrell?
How long on average sun shines in September in Harrell?
What is the UV index reading in September in Harrell?
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 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 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).
Harrell, Arkansas, USA
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