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
September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's tropical 93.9°F (34.4°C) to a still hot 87.3°F (30.7°C). Nighttime temperature dips to a mean of 66.2°F (19°C) during September.Heat index
For most parts of September, the heat index is computed to be a sweltering 98.6°F (37°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. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in September is 69%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.3 days and typically collects 2.2" (56mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Wilton, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:10 am and sunset at 7:01 pm CDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Wilton, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Wilton?
When are sunrise and sunset in September?
How many hours of sunshine does Wilton have in September?
What is the UV index reading in September?
Average temperature in September
Wilton, AR
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is August (93.9°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Wilton, AR
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Wilton, AR
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Wilton, AR
- Average humidity in September: 69%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Wilton, AR
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.84").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in September
Wilton, AR
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is August (16.3 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in September
Wilton, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Wilton, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 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
Wilton, 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: 10h and 0min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Wilton, AR
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is January (19.4 days).
The months with the least sunshine days are July and August (12 days).
Average UV index in September
Wilton, 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
Wilton, AR
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Wilton, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Wilton, Arkansas, USA
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