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
The onset of September brings with it an average high-temperature of a warm 82.2°F (27.9°C), showing a negligible variation from the month before. September nights in Harrisburg observe an average temperature dip to an enjoyable 64°F (17.8°C).Heat index
The heat index value during September is calculated to be a tropical 87.8°F (31°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
The average relative humidity in September in Harrisburg is 74%.Rainfall
In Harrisburg, in September, during 12.4 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, there are 152.8 rainfall days, and 37.28" (947mm) of precipitation is accumulated.Snowfall
In Harrisburg, snow does not fall in April through October.Daylight
In Harrisburg, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:35 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:47 pm CDT.
Sunshine
In Harrisburg, the average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in September transforms into this advice:
Act with care - The need to guard against sun damage is communicated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Harrisburg?
What is the average humidity in September in Harrisburg?
How much does it rain in Harrisburg in September?
When it does not snow in Harrisburg?
What is the average length of the day in September in Harrisburg?
When is the sunrise / sunset in September in Harrisburg?
How many hours of sunshine does Harrisburg have in September?
What is the UV index intensity in September in Harrisburg?
Average temperature in September
Harrisburg, AR
- Average high temperature in September: 82.2°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Harrisburg, 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
Harrisburg, AR
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Harrisburg, AR
- Average humidity in September: 74%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Harrisburg, AR
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is January (2.28").
Average rainfall days in September
Harrisburg, AR
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is December (10 days).
Average snowfall in September
Harrisburg, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Harrisburg, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.9 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
Harrisburg, 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 June (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Harrisburg, AR
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Harrisburg, AR
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Harrisburg, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Harrisburg, 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).
Harrisburg, Arkansas, USA
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