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
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's tropical 91.4°F (33°C) to a warm 84.6°F (29.2°C). Ione's September nights represent a significant downturn from the day's heat, with an average temperature of 62.4°F (16.9°C).Heat index
In September, the heat index is calculated to be a tropical 93.2°F (34°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Given the heat index, its values are aligned with shaded sites and gentle winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. 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 importance for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in September is 72%.Rainfall
In Ione, in September, it is raining for 11.8 days, with typically 2.36" (60mm) of accumulated precipitation. In Ione, during the entire year, the rain falls for 147.6 days and collects up to 36.89" (937mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Ione, sunrise is at 6:49 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 7:01 pm CDT.
Sunshine
In Ione, the average sunshine in September is 9.6h.UV index
In Ione, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 5 during September leads to these instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Ione, AR
- Average high temperature in September: 84.6°F
The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is January (48.2°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Ione, 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 (29.93"Hg).
Average wind speed in September
Ione, AR
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Ione, AR
- Average humidity in September: 72%
The months with the highest relative humidity are February, March and May (78%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Ione, AR
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (5.31").
The driest month (with the least rainfall) is January (2.09").
Average rainfall days in September
Ione, AR
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is August (15.1 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Ione, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Ione, 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
Ione, AR
- Average daylight in September: 12h and 2min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Ione, AR
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is December (20.1 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Ione, AR
- Average UV index in September: 5
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
Ione, AR
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Ione, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Ione, Arkansas, USA
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