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
Joan's September weather features a light decline in high-temperatures, reducing from a tropical 92.8°F (33.8°C) in August to a still hot 86.7°F (30.4°C). Joan's average low-temperature for the month of September denotes a significant decline from the daily high, recording at a refreshing 64.9°F (18.3°C).Heat index
In September, the average heat index is evaluated at a fiery hot 96.8°F (36°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.Note that heat index values are valued for light wind and location in the shade. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
The months with the lowest humidity are July through October, with an average relative humidity of 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 1.14" (29mm) of precipitation.Snowfall
In Joan, snow does not fall in March through December.Daylight
In Joan, the average length of the day in September is 12h and 22min.On the first day of September in Joan, sunrise is at 6:45 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm CDT.
Sunshine
In Joan, Arkansas, the average sunshine in September is 9.5h.UV index
In Joan, 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 average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Joan?
What are the least humid months in Joan?
What is the average humidity in September in Joan?
What is the driest month in Joan?
How many days does it rain in September in Joan?
When it does not snow in Joan?
What is the average length of the day in September in Joan?
When is the sunrise / sunset in September in Joan?
How long on average sun shines in September in Joan?
How high is the UV index in September in Joan?
Average temperature in September
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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
Joan, 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).
Joan, Arkansas, USA
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