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 reveals a small adjustment in temperature, transitioning from an average high of a tropical 88.2°F (31.2°C) in August to a moderately hot 81.1°F (27.3°C). Harmon's nighttime temperature during September is consistently averaged at a refreshing 61.2°F (16.2°C).Heat index
The heat index value for September is computed to be a tropical 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.It is important to note that the heat index values are for shaded areas and light wind scenarios. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In Harmon, the average relative humidity in September is 73%.Rainfall
In Harmon, in September, it is raining for 13.3 days, with typically 2.6" (66mm) of accumulated precipitation. In Harmon, during the entire year, the rain falls for 151.2 days and collects up to 33.15" (842mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:12 am and sunset at 7:01 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Harmon in September?
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 Harmon have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Harmon have in September?
How high is the UV index in September?
Average temperature in September
Harmon, AR
- Average high temperature in September: 81.1°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: 61.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
Harmon, 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
Harmon, AR
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Harmon, AR
- Average humidity in September: 73%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in September
Harmon, AR
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is February (1.73").
Average rainfall days in September
Harmon, AR
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
Harmon, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Harmon, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harmon, 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 42min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Harmon, AR
- Average sunshine days in September: 15.1 days
The months with the most sunshine days are January and December (19.8 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in September
Harmon, 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
Harmon, AR
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Harmon, 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).
Harmon, Arkansas, USA
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