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
A moderate decline in average high-temperatures is noted in September, moving from a tropical 86.5°F (30.3°C) in August to a warm 81°F (27.2°C). Jonesboro's nights in September cool down to an average low-temperature of 60.6°F (15.9°C).Heat index
September's mean heat index is evaluated at 84.2°F (29°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The average relative humidity in September in Jonesboro is 73%.Rainfall
September is the month with the least rainfall in Jonesboro. Rain falls for 10.8 days and accumulates 1.3" (33mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Jonesboro, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:25 pm. On the last day of September, in Jonesboro, Illinois, sunrise is at 6:52 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
The average daily maximum UV index in September in Jonesboro is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What are the temperatures in Jonesboro in September?
What is the average humidity in September in Jonesboro?
What is the driest month in Jonesboro?
How many days does it rain in September in Jonesboro?
When it does not snow in Jonesboro?
Does it snow in Jonesboro in September?
What is the average length of the day in September in Jonesboro?
When are sunrise and sunset in September in Jonesboro?
How many hours of sunshine does Jonesboro have in September?
What is the UV index reading in September in Jonesboro?
Average temperature in September
Jonesboro, IL
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in September
Jonesboro, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Jonesboro, IL
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Jonesboro, IL
- Average humidity in September: 73%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Jonesboro, IL
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in September
Jonesboro, IL
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Jonesboro, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Jonesboro, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jonesboro, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in September
Jonesboro, IL
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is October (21 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Jonesboro, IL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Jonesboro, IL
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in September
Jonesboro, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Jonesboro, Illinois, USA
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