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 ushers in a minute temperature change, with average high-temperatures reducing from August's tropical 88°F (31.1°C) to a moderately hot 81°F (27.2°C). Johnson usually reports an average low-temperature of 60.6°F (15.9°C) during the month of September.Heat index
During September, the heat index is estimated at 84.2°F (29°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
The average relative humidity in September in Johnson, Arkansas, is 73%.Rainfall
In Johnson, in September, during 14 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 161.1 rainfall days, and 34.09" (866mm) of precipitation is accumulated.Snowfall
In Johnson, snow does not fall in June through October.Daylight
In Johnson, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:01 pm CDT.
Sunshine
In Johnson, Arkansas, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September 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: In September, the maximum UV index of 5 translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Johnson have 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
Johnson, AR
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (44.4°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in September
Johnson, AR
- Average pressure in September: 30.02"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
Johnson, AR
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Johnson, AR
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (77%).
The months with the lowest relative humidity are August and October (72%).
Average rainfall in September
Johnson, AR
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is February (1.81").
Average rainfall days in September
Johnson, AR
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Johnson, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Johnson, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Johnson, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Johnson, AR
- Average sunshine days in September: 14.1 days
The months with the most sunshine days are January and December (18.5 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in September
Johnson, AR
- 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 and December (UV index 2).
Average cloud cover in September
Johnson, AR
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Johnson, AR
- 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).
Johnson, Arkansas, USA
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