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 comes with a mild decrease in the average high-temperature, moving subtly from a tropical 93°F (33.9°C) in August to a still hot 87.6°F (30.9°C). Harmony Grove logs a substantial downturn to a refreshing 66°F (18.9°C) during September nights, a considerable shift from daytime highs.Heat index
For September, the heat index is calculated to be a very hot 100.4°F (38°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
The months with the lowest humidity are July through October, with an average relative humidity of 71%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 2.01" (51mm) of precipitation.Snowfall
April through October are months without snowfall in Harmony Grove.Daylight
The average length of the day in September in Harmony Grove is 12h and 22min.On the first day of September, sunrise is at 6:45 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:56 pm CDT.
Sunshine
In Harmony Grove, Arkansas, the average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September in Harmony Grove is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 6 in September translates into these instructions:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Harmony Grove in September?
What are the least humid months in Harmony Grove?
What is the average humidity in September in Harmony Grove?
What is the driest month in Harmony Grove?
How many days does it rain in September in Harmony Grove?
When it does not snow in Harmony Grove?
What is the average length of the day in September in Harmony Grove?
When is the sunrise / sunset in September in Harmony Grove?
How many hours of sunshine does Harmony Grove have in September?
What is the UV index intensity in September in Harmony Grove?
Average temperature in September
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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
Harmony Grove, 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).
Harmony Grove, Arkansas, USA
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