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
In the transition to September, Lester Junction observes a minor drop in the average high-temperature, shifting from a tropical 93°F (33.9°C) in August to a still hot 87.6°F (30.9°C). During September, the nighttime temperature presents a clear descent from the daily peaks, falling to an average of 66°F (18.9°C).Heat index
In September, the heat index is appraised at a torrid 100.4°F (38°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
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 11.5 days and typically collects 2.01" (51mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Lester Junction, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:46 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Lester Junction, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the UV index of 6 transforms into the following advice:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the least humid month?
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 in Lester Junction?
What is the average length of the day in September?
When are sunrise and sunset in September in Lester Junction?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Lester Junction, AR
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is January (52°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Lester Junction, 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
Lester Junction, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Lester Junction, 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
Lester Junction, AR
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is April (4.88").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Lester Junction, AR
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in September
Lester Junction, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lester Junction, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.7 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
Lester Junction, 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 July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Lester Junction, AR
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Lester Junction, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Lester Junction, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility in September
Lester Junction, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Lester Junction, Arkansas, USA
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